A. Class Annelida
B. Class Oligochaeta
C. Class Hirudinea
D. Class Polychaeta
Tubeworms that create
tubes out of sand,
mucus, and bits of
shells belong to which
class?
Answers
Tubeworms that create tubes out of sand, mucus, and bits of shells belong to which class Polychaeta.
The correct option is (D) Class Polychaeta
Polychaeta, often known as bristle worms or polychaetes, is a paraphyletic class of mostly marine annelid worms. Each body segment contains two fleshy projections called parapodia that are covered in many chitin-made bristles called chaetae. The lugworm (Arenicola marina) and the sandworm or clam worm Alitta are frequent examples. As a group, polychaetes are strong and ubiquitous, ranging from species that can survive in the deepest parts of the ocean's abyssal plain to forms that can withstand the extremely hot temperatures found close to hydrothermal vents. From species that live as plankton close to the surface to a 2- to 3-cm specimen (yet unclassified) seen by the robot ocean explorer Nereus at the bottom of the Challenger Deep, the deepest known location in the Earth's seas, polychaetes are found across the waters of the planet. Less than 2% of all polychaetes (only 168 species) are known from freshwater habitats.Learn more about the Polychaeta with the help of the given link:
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Related Questions
In a population of lizards, one allele codes for blue tails and another allele codes for brown tails.
Which statement is true about the allele frequencies if the population is in Hardy-Weinberg equilibrium?
Responses
A new mutation introduces a new allele.
A new mutation introduces a new allele.
The frequency of blue tails is increasing.
The frequency of blue tails is increasing.
The frequency of brown tails is increasing.
The frequency of brown tails is increasing.
The allele frequencies are stable.
Answers
Answer: D. The allele frequencies are stable.
Explanation: Took the test >:)
In this scenario, since no new mutation or any other factor affects the allele frequencies, they would remain stable over time. Therefore, the correct answer is: The allele frequencies are stable.
What is Hardy-Weinberg equilibrium?Hardy-Weinberg equilibrium is a principle in population genetics that describes the theoretical distribution of genetic variation in an ideal, non-evolving population. The principle states that, without evolutionary forces, the frequencies of alleles and genotypes in a population will remain constant from generation to generation.
Explain the term mutation.The mutation is a process that produces a change in the DNA sequence of an organism's genome. Mutations can occur spontaneously during DNA replication, as well as due to exposure to mutagens such as radiation or chemicals.
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Fungi a. typically reproduce sexually when environmental conditions are poOr: b. typically reproduce sexually when environmental conditions are good. c. always reproduce sexually: d. always reproduce asexually
Answers
Fungi typically reproduce sexually when environmental conditions are poor. Sexual reproduction is frequently observed in fungus in response to poor environmental circumstances.
There are two sorts of mating. When two forms of mating are present in the same mycelium, it is referred to be homothallic, or self-fertile. To reproduce sexually, heterothallic mycelia require two distinct yet compatible mycelia.
However, historical accumulations of fungal spores are an important component of palynological records that are otherwise dominated by spores produced by seedless plants and pollen from seed plants.
Changes in the proportions of different types of fungal spores can reveal important details about the biological communities and climatic conditions that supported these fungi.
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What are 5 ways to prevent non communicable diseases?.
Answers
Quit smoking, eat well, exercise, keep an eye on your blood pressure, manage your diabetes, and assess your stress.
Why is it important to fight non-communicable diseases?Chronic diseases, often known as noncommunicable diseases, are the main cause of death and incapacity worldwide. They account for more mortality in high-income countries than in low-income ones, accounting for seven out of every ten deaths in the United States.
What exactly does communicable illness prevention entail?Don't share towels between washes or personal items that can't be cleaned, such toothbrushes and razors. Safely handle and prepare food. Always wash produce before eating it.
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You and your classmates decide to plant 24 daisy seeds in an empty field. Ten years later, you pass by the field again. It is now filled with thousands of the daises! In 3-5 sentences, explain how the daisies ended up filling the field.
Answers
As the years passed, the number of daisy plants increased exponentially, leading to the field being filled with thousands of daisies.
The daisy plants grew and reproduced over the years, creating new daisy plants from the original 24 seeds. Daisies are known to spread rapidly, and each plant can produce many seeds that can grow into new plants.
The growth and spread of the daisy plants were likely aided by favorable environmental conditions, such as ample sunlight and nutrients in the soil. Daisy plants can reproduce both sexually and asexually. Sexual reproduction involves the formation of seeds that can grow into new plants. Asexual reproduction involves the growth of new plants from existing parts of a plant, such as stems or roots. Daisy plants can also spread through rhizomes, which are underground stems that grow horizontally and produce new plants.
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Most phenotypic traits—features of the organism that we can observe—are not easy to put into a Punnet Square. Give at least two reasons, or factors, that make most phenotypic traits complicated. How, then, can we measure these traits?
Answers
Most phenotypic traits are complex due to polygenic inheritance and environmental influences.
Phenotypic traits often result from the combined effects of multiple genes (polygenic inheritance) and can be influenced by environmental factors. Punnett Squares, which illustrate single gene pair inheritance, are not suitable for capturing the complexity of such traits. Additionally, environmental factors can interact with genetic factors, leading to variations in trait expression.
To measure complex phenotypic traits, alternative approaches are used. Quantitative measurements, such as height or weight, provide precise numerical values. Statistical analysis helps identify patterns, correlations, and heritability estimates in populations. It involves studying large sample sizes and employing statistical models to understand the contributions of genetic and environmental factors. Molecular genetics advancements have further enhanced our ability to study complex traits at the genetic level.
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Which of the following factors affecting population growth is density
independent?
A. Competition
B. Disease
C. Natural disaster
D. Predation
Answers
C. Natural disaster is a density-independent factor affecting population growth. Density-independent factors are those that affect the population irrespective of the population size or density.
How Natural disasters reduce population sizes?Natural disasters such as floods, hurricanes, earthquakes, and wildfires can reduce population sizes regardless of how many individuals were present in the population before the disaster occurred. The other factors listed - competition, disease, and predation - are all density-dependent factors, which means that they become more significant as the population size or density increases.
Competition is an example of a density-dependent factor, as it increases as the population size increases. As more individuals compete for limited resources such as food, water, and shelter, the rate of population growth slows down.
Disease is another density-dependent factor, as it spreads more easily in crowded populations where individuals are in close contact with one another.
On the other hand, natural disasters such as floods, hurricanes, and wildfires are examples of density-independent factors. These events can affect a population regardless of its size, and they can cause significant decreases in population size.
Predation can be both a density-dependent and density-independent factor. In some cases, predation can increase as the population size increases, making it a density-dependent factor. However, predators can also reduce the population size through random hunting or selective hunting of weaker individuals, making it a density-independent factor.
Understanding the factors that affect population growth is important for predicting and managing population sizes in both natural and human-made ecosystems.
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Scientists believe all of the following will occur due to the warming of the
climate except for what?
More Rain
Hurricanes
Volcanoes
Drought
Answers
Answer:
volcanoes
Explanation:
volcanoes don't change due to temperature or sea rise. hope this works!
Which of these are the proper terms for the different ways an organ can be sectioned?frontal, oblique, transverse lateral, medial, transverse proximal, distal, oblique caudal, superior, longitudinal frontal, sagittal, coronal
Answers
These are the proper terms for the different ways an organ can be sectioned: longitudinal, coronal, and transverse.
To describe the direction of movements аnd locаtion of different body structures, а hypotheticаl plаne is referred to аs аn аnаtomicаl plаne thаt is used to trаnsect the body. In the аnаtomy of аnimаls аnd humаns, three plаnes аre used.
Longitudinаl section: This plаne is pаrаllel to the sаgittаl suture. It splits the body to the right аnd left. It is аlso nаmed аn аnteroposterior or longitudinаl plаne.Coronаl Section: This plаne divides the body into dorsаl аnd ventrаl or аnterior-posterior pаrts. It is аlso referred to аs the frontаl or coronаl plаne аnd it shows the coronаl view.Trаnsverse Section: This plаne divides the body into crаniаl аnd cаudаl pаrts, which meаns heаd аnd tаil portion. It is аlso known аs the horizontаl plаne.Your options are not well arranged, but most probably your options were
a. frontal, oblique, transverse
b. lateral, medial, transverse
c. proximal, distal, oblique
d. caudal, superior, longitudinal
e. frontal, sagittal, coronal
Thus, there is no correct answer, because the correct answer is longitudinal, coronal and transverse.
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2 Which substance, needed for protein synthesis, is carried into a leaf from the stem? A carbon dioxide B nitrate C oxygen D starch
Answers
The substance, needed for protein synthesis, that is carried into a leaf from the stem is nitrate. Nitrate is an essential nutrient that plants use to produce amino acids and proteins. It is a part of the nitrogen cycle and is used in chloroplasts to create essential proteins.Option B is correct
The process of protein synthesis takes place in chloroplasts of the leaves of plants where nitrogen, along with other elements, is utilized to produce proteins. Nitrogen, in the form of nitrate, is an essential element required by the plant for the synthesis of amino acids and proteins.
Plants obtain nitrate through the soil from the water they absorb through their roots. It is transported from the roots to the leaves through the xylem vessels, which form a continuous pipeline from the roots to the stem and leaves of the plant. The process of protein synthesis is important for the growth and development of plants.
It is essential for the production of enzymes, hormones, and structural components such as cell walls and membranes. Nitrate is, therefore, a critical substance for protein synthesis and the growth and development of plants. Option B is correct
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what is aim ?
good evening
Answers
Answer:
point or direction ( a weapon or camera) at a target.
There are two types of "Aim". With regard to:♪
Physically:-
Aim can be defined as the point to which a thing or person sets a target for achieving a goal.
Mentally:-
In terms of students' studying, it refers to focusing on subjects in order to achieve excellent marks during examinations.
Example-
• An archer pointing toward the archboard.
• A police running after a thief etc.,
Hope it helps you...
Answered by Benjemin ☺️
✅
PLEASE HELP i need this fast i will give BRAINLIEST
Answers
Answer:
1 is
Explanation:
no. 1 is water cycle
no.2 is food chain
no.3 is carbon-oxygen cycle
no.4 is mineral cycle
help im half asleep and its due today
Answers
1. A channel that provides a tube-like opening in the plasma membrane through which particles can diffuse is a transport protein.
What is the correct description of the given terms?The correct description of the given terms is as follows:
1. Transport protein - A channel that provides a tube-like opening in the plasma membrane through which particles can diffuse
2. Active transport - Is used during active transport but not passive transport
3. Diffusion - Process by which a cell takes in the material by forming a vesicle around it
4. Passive transport - Particle movement from an area of higher concentration to an area of lower concentration
5. Exocytosis - Process by which a cell expels wastes from a vesicle 6. A form of passive transport that uses transport proteins
7. Active transport - Particle movement from an area of lower concentration to an area of higher concentration
8. Osmosis - The diffusion of water through a cell membrane
9. Passive transport- The movement of substances through the cell membrane without the use of cellular energy
10. Transport protein - Used to help substances enter or exit the cell membrane
11. Active transport - When energy is required to move materials through a cell membrane 12. When the molecules of one substance are spread evenly throughout another substance to become balanced
13. Exocytosis - A vesicle membrane fuses (becomes a part of) the cell membrane and the contents are released from the cell
14. Endocytosis - The cell membrane forms around another substance, for example, how the amoeba gets its food
15. Diffusion - When molecules move from areas of high concentration to areas of low concentration
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Complete question:
Match the term with its correct description:
a. energy
b. facilitated diffusion
c. endocytosis
f. exocytosis
g. transport protein
d. passive transport
1. A channel that provides a tube-like opening in the plasma membrane through which particles can diffuse
2. Is used during active transport but not passive transport
3. Process by which a cell takes in material by forming a vesicle around it
4. Particle movement from an area of higher concentration to an area of lower concentration
5. Process by which a cell expels wastes from a vesicle 6. A form of passive transport that uses transport proteins
7. Particle movement from an area of lower concentration to an area of higher concentration
Match the term with its correct description:
a. transport protein
b. active transport
c. diffusion
d. passive transport
e. osmosis
f. endocytosis
g. exocytosis
h. equilibrium
8. The diffusion of water through a cell membrane
9. The movement of substances through the cell membrane without the use of cellular energy
10. Used to help substances enter or exit the cell membrane
11. When energy is required to move materials through a cell membrane 12. When the molecules of one substance are spread evenly throughout another substance to become balanced
13. A vesicle membrane fuses (becomes a part of) the cell membrane and the contents are released from the cell
14. The cell membrane forms around another substance, for example, how the amoeba gets its food
15. When molecules move from areas of high concentration to areas of low concentration
Which of the following surface features do you observe on the land or ocean floor on or near Hawaii? Choose ALL that apply. Mid-ocean ridge Fracture Zones Abyssal plane (smooth and deep featureless plane) Volcanic Island Arc Oceanic Trench Continental Rift Continental Volcanic Arc Continental Collision Zone (high elevation landlocked mountains and plateaus) Continental Shelf Fault Trace (intersection of the fault with the ground surface that looks like a linear break in the Earth's surface) Horizontal Offset (such as an offset river valley) Linear chain of volcanoes far from a plate boundary (may transition into a line of seamounts)
Answers
The surface features observed on or near Hawaii include Volcanic Island Arc, Continental Rift, and Continental Volcanic Arc.
What surface features are found near Hawaii?On or near Hawaii, there are several distinct surface features.
Firstly, a Volcanic Island Arc is present, characterized by a chain of volcanic islands formed by the subduction of one tectonic plate beneath another. Secondly, a Continental Rift can be observed, indicating the presence of a divergent boundary where the Earth's crust is pulling apart, leading to the formation of a rift valley.
Lastly, a Continental Volcanic Arc is present, which is a chain of volcanoes that form on a continental plate above a subduction zone. These volcanoes are typically formed by the subduction of an oceanic plate beneath a continental plate.
These surface features near Hawaii are a result of the complex tectonic activity in the region, primarily influenced by the Pacific Plate's interaction with other neighboring plates.
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pls help me i cant think rn hah (screenshot included!)
Answers
Answer:
I think it's B,
Explanation:
It's the zone that has an important role in providing nutrients.
Is Huntington's Disease caused from a mutated gene?
Answers
Yes,Huntington disease (HD) is caused by a change ( mutation ) in the HTT gene.
What is the greatest eliminator of a species in terms of habitat destruction?
А plowing of grasslands
B deforestation in tropical areas
С destruction of coral reefs
D destruction of wetlands
Answers
Answer:
i think B.
Explanation:
That destroys a habitat for many species
A Mitosis inhibitor is a medication that is designed to prevent mitosis in certain cells why would these be helpful in the treatment of tumors
Answers
Answer: It would be helpful because the cells that cause tumors would not undergo Mitosis.
Which one is odd one out on the basis of respiration:
Amoeba, cockroach, earthworm, euglena
Answers
Answer:
Cockroach is you answer.
Explanation:
They do this by using a very efficient breathing system that uses air filled tubes, called trachea, to deliver oxygen directly to cells. Oxygen flows in as required into the tracheal system through valves on the insect, called spiracles. But, sometimes, they shut their spiracles and stop breathing.
product remaining after the animal carcass has been processed
Answers
In actuality, carcass animal products can serve as the foundation for a wide range of other items, including soaps, paints, candles, plastics, and rubber goods.
There is zero chance that any bacteria or viruses will remain in the processed carcasses because all animal by-products are sterilized at extremely high temperatures.
To ensure thorough bleeding and ease of evisceration, animals should be kept off food for 12 to 24 hours before to slaughter while still having access to water (the removal of internal organs). Livestock are held in a chute that restricts their ability to move as the killing process gets underway.
Pre-slaughter handling, stunning, and slaughtering are the three separate steps involved in killing animals. The Humane Slaughter Act mandates that animals in the United States be treated humanely at each of these steps. meat processing; the fundamental slaughtering process.
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Brown, L. R. et al. (1978). Effects of selected caries preventive regiments on microbial changes following irradiation induced xerostomia in cancer patients. Microbial Aspects of Dental Caries, pp. 275-290.
1. What clinical phenomena did this study investigate?
2. Briefly describe the key elements of this method.
3. What are the most significant microbial changes in the xerostomatic patient and what
do you think is the clinical relevance?
3. Since oral hygiene alone is not effective in controlling caries in the xerostomatic
patient what other things can be done to slow the progression development of caries.
Answers
1. This study investigated the effects of selected caries preventive regimens on microbial changes following irradiation-induced xerostomia in cancer patients.
2. The key elements of this method include selecting cancer patients with xerostomia as the study subjects, applying various caries preventive regimens to these patients, and analyzing the microbial changes in their mouths.
3. The most significant microbial changes in the xerostomatic patient include a decrease in saliva flow, changes in the oral microbiota, and an increase in the number of acid-producing bacteria. The clinical relevance of these changes is that they can lead to an increased risk of dental caries and other oral health problems.
4. Besides oral hygiene, other things that can be done to slow the progression and development of caries in the xerostomatic patient include using fluoride treatments, using saliva substitutes, increasing water intake, and avoiding sugary and acidic foods and drinks. These measures can help to maintain a healthy oral environment and prevent further damage to the teeth.
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are all african lions the same species
Answers
Answer:
Yes, They are all the same species.
Explanation:
However there are many sub species
what forms majority of the plasma membrane of cells
Answers
Answer:
phospholipids
Phospholipid Bilayer
The plasma membrane is composed mainly of phospholipids, which consist of fatty acids and alcohol. The phospholipids in the plasma membrane are arranged in two layers, called a phospholipid bilayer.:
What is the term that refers to transport of materials or molecules small enough to cross through pores in a membrane?
A.filtration
B.facilitated diffusion
C.diffusion
D.osmosis
Answers
The term that refers to the transport of materials or molecules small enough to cross through pores in a membrane is known as the filtration process (Option A is correct).
What is the filtration process?Filtration refers to the process in which solid particles present in the cell media (which is a liquid medium) can be separated by selective passage while retaining these particles.
In conclusion, the term that refers to the transport of materials or molecules small enough to cross through pores in a membrane is known as the filtration process (Option A is correct).
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Answer:
I hope this helps.
Explanation:
What is soil salinization
A. The accumulation of salt in the soil
B. The reduction of salt in the soil
C. The reduction of nutrients in the soil
D. The accumulation of nutrients in the soil
Answers
Soil salinization is the accumulation of salts in the soil where the soluble salts are present in the soil typically it is the table salt. The correct answer is option A.
What is the name of most common salt ?It is the common salt that is the sodium chloride and the NaCl.
The excessive accumulation of salts of water soluble salts that are present in the soil. The various salts are sodium chloride and the most common constituent along with the sodium are magnesium, potassium, calcium and sulfates.
On the effect of soil salinization it affects the crop yields and the crop production that is affected as well as the salts that are present in the soil and the crops along with the soil fractures happen too.
The contamination of salt water and the soil erosion takes place with the nutrients getting away with the soil washing off.
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Which process is part of translation but not transcription?
A DNA template is used to create an mRNA strand.
A tRNA template is used to create a DNA strand.
A tRNA template is used to create an mRNA strand.
An mRNA template is used to create an amino acid chain.
Answers
Answer:
An mRNA template is used to create an amino acid chain.
Explanation:
Transcription is the process where new mRNA is created from DNA. Translation, however, is the process of creating proteins by using mRNA as a template. Proteins are made up of amino acids often in the form of an amino acid chain.
The process that is part of translation but not transcription is "mRNA template is used to create an amino acid chain"
PROTEIN SYNTHESIS:
Protein synthesis is the process that synthesizes amino acid sequence (protein) from genes. The process involves two steps namely: transcription and translation. Transcription is the process whereby a DNA molecule is used to synthesize a mRNA molecule in the nucleus of the cell. Translation is the process whereby the mRNA transcript is used to synthesize an amino acid sequence in the ribosome. Therefore, the process that is part of translation but not transcription is "mRNA template is used to create an amino acid chain"Learn more at: https://brainly.com/question/11390351?referrer=searchResults
When a stem cell differentiates and changes in size and shape, specific genes are being(1 point)
expressed.
spliced.
transcribed.
copied.
Answers
When a stem cell differentiates and changes in size and shape, specific genes are being EXPRESSED.
Stem cells are cells from which specialized types of cells with specific functions are generated.Gene expression refers to the process by which genes are first transcribed into messenger RNAs (mRNAs) and subsequently translated into proteins.The process of differential gene expression leads to the development of different types of cells because different characteristics (i.e., different proteins) are being expressed in the cell.In conclusion, when a stem cell differentiates and changes in size and shape, specific genes are being EXPRESSED.
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the choroid plexus is made from capillaries and ______.
Answers
The choroid plexus is a network of blood vessels located in the brain's ventricles that produces cerebrospinal fluid (CSF). This fluid helps to protect and cushion the brain and spinal cord. The choroid plexus is composed of capillaries and specialized cells called ependymal cells.
These cells are responsible for filtering blood plasma and secreting CSF. The capillaries provide a rich blood supply to the choroid plexus, allowing for the filtration and secretion processes to occur. The ependymal cells work in conjunction with the capillaries to regulate the composition and volume of CSF.
Additionally, the choroid plexus plays a vital role in removing waste products from the brain, maintaining brain homeostasis, and providing nutrients to the central nervous system. In summary, the choroid plexus is made up of capillaries and ependymal cells and is responsible for producing and regulating CSF in the brain.
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Which of the following lists the steps of the scientific method in the correct order?
Answers
Answer:
C. observation, question, hypothesis, prediction, experiment/observation, conclusion
Explanation:
Where are the high tides if the moon is in first quarter?
Answers
The first and third halves of the moon, when the moon seems to be "half full," are when neap tides occur.
When tides are at their peak, where is the moon?Every month, at perigee, when the moon is closest to Earth, tidal-generating forces are stronger than usual, resulting in tide ranges that are higher than typical. When the moon is at its furthest distance from Earth, or apogee, about two weeks later, the lunar tide-raising effect is weaker and the tidal ranges are smaller than usual.
How does a first quarter moon affect things?The Moon is facing the Earth and Sun at a 90-degree angle during this phase. The Moon appears to be partially lighted and partially in shadow. We observe what appears to be the right half during the first quarter.
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Why was the path to discovery of the theory evolution easy or difficult? (Explain)