No cell wall, round/irregular shape, one or more small vacuoles, centriole, no chloroplasts, cytoplasm, ER, ribosomes, mitochondria, Golgi apparatus, plasma membrane, lysosomes, nucleus, cilia, peroxisomes, cytoskeleton, flagella, DNA
Answer:
an animal cell
Explanation:
all of these characteristics define an animal cell
1.1.7.
What is the difference between eukaryotic and prokaryotic cells?
A. Eukaryotic cells are found in bacteria and prokaryotic cells are not.
B. Prokaryotic cells are found in plants and animals and eukaryotic cells
are not.
C. Eukaryotic cells contain organelles and DNA enclosed within a nucleus
and prokaryotic cells do not.
D. Prokaryotic cells contain no organelles except DNA enclosed within a
nucleus and eukaryotic cells do not.
Answer:
I think it's D, because prokaryotes have no organelles, yet their DNA can be enclosed in a small nucleus (nucleolus).
according to the fluid mosaic model,plasma membrane are mainly composed of phospholipids and proteins.Explain how structures S and T play the roles in the plasma membrane,which function as a selective barrier. please help me with this question
Answer:
The plasma membrane is a thin layer of lipid molecules that surrounds the cell and separates the inside from the outside. The fluid mosaic model describes the structure of the plasma membrane as a two-layered structure of phospholipids with embedded proteins. This model explains how the structure of the plasma membrane allows it to act as a selective barrier, regulating the movement of substances in and out of the cell.
Structure S in the plasma membrane is represented by the phospholipids, which form a lipid bilayer with hydrophilic heads facing outwards and hydrophobic tails facing inwards. The hydrophilic heads are in contact with the extracellular fluid and intracellular fluid while the hydrophobic tails are in the middle of the membrane. The phospholipid bilayer provides a barrier that separates the inside and outside of the cell, restricting the movement of hydrophilic and large molecules through the membrane while allowing the passage of small and hydrophobic molecules.
Structure T represents the integral membrane proteins that are embedded in the lipid bilayer. These proteins have different functions, such as transport of molecules, cell signaling, and catalyzing chemical reactions. The proteins also contribute to the selective permeability of the membrane by regulating the movement of specific molecules in and out of the cell. For example, channels and carrier proteins regulate the movement of ions and larger molecules through the membrane while receptor proteins receive signals from the outside of the cell and relay them to the inside of the cell.
In summary, the plasma membrane is mainly composed of phospholipids and proteins according to the fluid mosaic model. The phospholipids form a lipid bilayer that acts as a barrier, while the proteins embedded in the bilayer regulate the selective permeability of the membrane by facilitating the movement of specific molecules in and out of the cell.
Explanation:
Which of these are spore-producing structures? (A) sporophyte (capsule) of a moss (B) antheridium of a moss or fern (C) archegonium of a moss or fern (D) gametophyte of a moss
A sporophyte (capsules) of a moss is spore-producing structures
What is sporophyte?A sporophyte is that the diploid multicellular stage in the life cycle of a plant or alga. It develops from the zygote produced when a haploid ovum is fertilized by a haploid sperm and each sporophyte cell, therefore, features a double set of chromosomes, one set from each parent.
Process of Sporophyte :All land plants, and most multicellular algae, have life cycles during which a multicellular diploid sporophyte phase alternates with a multicellular haploid gametophyte phase. within the seed plants, the most important groups of which are the gymnosperms and flowering plants (angiosperms), the sporophyte phase are more prominent than the gametophyte and is that the familiar green plant with its roots, stem, leaves, and cones or flowers. In flowering plants, the gametophytes are very reduced in size and are represented by the germinated pollen and therefore the embryo sac.
The sporophyte produces spores (hence the name) by meiosis, a process also referred to as "reduction division" that reduces the number of chromosomes in each spore mother cell by half.
The resulting meiospores become a gametophyte. Both the spores and therefore the resulting gametophyte are haploid, meaning they only have one set of chromosomes.
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Why are zygotes considered unique?
Answer:
Each zygote has its own combination of genes
Explanation:
which of these explains why a drug that damages capsids can help in the treatment of a viral infection
Viruses are composed of genetic material surrounded by a capsid made of proteins. D. a drug that damages capsids can help in the treatment of a viral infection because capsids provide protection for viruses.
What is the viral structure?
The virus structure includes genetic material (DNA or RNA) inside a proteic protector layer known as the capsid.
The capsid structure might vary among viruses. It is composed of proteins that are codified by the viral genes in the viral genome.
Basically, the virus structure is always genetic material (DNI or RNA) surrounded or protected by proteins.
The correct option is D. Capsids provide protection for viruses.
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Complete question:
Why would a drug that damages capsids help treat a viral infection?
A. Capsids prevent the lytic cycle from beginning.
B. Transduction requires a capsid.
C. Viruses use capsids to increase genetic variation.
D. Capsids provide protection for viruses.
Kim et al. used ESM and C-AFM to visualize hydrophilic ion channels near the surface of Nafion membranes with the addition of H3PW12O3 (PWA; phosphotungstic acid).
Electrochemical strain microscopy (ESM) and conductive atomic force microscopy (C-AFM) are used to create and examine polymer composite electrolytes of Nafion and phosphotungstic acid (PWA) in order to see the hydrophilic ion channels near the surface, which are made up of water and sulfonic acid groups.
The findings show that the fibrillar objects in the ESM image are hydrophilic ion channels and additional ion channels created by interaction between PWA and sulfonic groups in Nafion, without major topographic alterations. Through the combined use of ESM and C-AFM, the buried ion channels beneath the surface as well as the intake and exit of the channels on the surface are investigated in this study. The findings improve our knowledge of ionic conduction in composite polymer electrolytes in a variety of fields.
Can fast salt ion transport be achieved by membranes with narrow molecular-sized channels and hydrophilic properties?Here, we present a novel method for constructing membranes that have strong size-exclusion selectivity for tiny organic compounds, narrow molecular-sized channels, and hydrophilic functionality.
What function do AO-PIMS' hydrophilic ionizable groups serve?These findings imply that the hydrophilic ionizable groups in AO-PIMs are crucial in lowering ion transport resistance and enabling RFBs to function effectively. Fig. 4: Aqueous redox flow batteries can operate effectively and steadily thanks to hydrophilic microporous membranes
What are electrogenic ion pumps?an ion pump that produces a net charge flow as it operates. Na+-K+ All animal cells have an enzyme called ATPase, which pumps potassium into cells while removing sodium from cells, in the plasma membrane.
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One limitation of food webs in representing an ecosystem is that they do not
A. Include producers in the ecosystem
B. Show consumer in the ecosystem
C.include all species in the ecosystem
D. Show predator prey relationships
Answer:
I think D (This isn't verified as correct, only my best concluded answer in terms of correction.)
Explanation:
The reason why I believe D is the answer is because the other answers are included in a food web. The reason for considering D is because I'm pretty sure that consumers are apart of a food web which could be logical for eliminating answer B. D would be a good answer considering that a food web consists of producerd and consumers and the transfer of energy. Relative to whether that's considered as a predator prey relationship other than an energy transfer relationship then D would probably be your answer.
One limitation of food webs in representing an ecosystem is that they do not show predator-prey relationships. So, the correct option is (D).
What is Food web?A food web is defined as the natural interconnection of food chains and is a graphical representation of what-eats in an ecological community. It is also known as a food web consumer-resource system.
A food chain is described as the direct transfer of energy between organisms, where each organism may feed on many things while the food web is a more realistic and simplified way of transferring energy in an ecosystem.
For the information above, consumers are different from a food web which may be logical where a food web consists of producers and consumers and there is a transfer of energy but in addition to the energy transfer relationship is considered as a predator prey relationship goes.
Thus, one limitation of food webs in representing an ecosystem is that they do not show predator-prey relationships. So, the correct option is (D).
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across a stress gradient, where are species interactions most important for determining community members?
Across a stress gradient, where are species interactions most important for determining community members are species richness and species evenness.
Species interactions describe the relationships among organisms of various species residing in the equal region. Examples include herbivores consuming flowers, carnivores consuming other animals, and organisms competing for meals, space, or buddies. The states of all the abiotic and biotic additives of the surroundings.
Species interactions inside ecological webs consist of 4 principal sorts of two-manner interactions: mutualism, commensalism, opposition, and predation, which incorporates herbivory and parasitism.
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Persons who eat 18-30 grams of ________ are less likely to suffer from constipation, diverticulosis, heart disease, obesity, diabetes mellitus, and certain cancers, compared to those who eat minimal amounts.
A) fiber
B) sugar substitutes
C) carbohydrate substitutes
D) carbon nutrients
Answer:
A.) Fiber
Explanation:
Got from Quizlet...
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common portion sizes have increased drastically in the past 20 years. group of answer choices true false
True , The statement "common portion sizes have increased drastically in the past 20 years" is generally considered to be true. Over the past two decades, there has been a trend towards larger portion sizes in a variety of foods, including restaurant meals, packaged foods, and even in households where meals are cooked at home.
This trend has been driven by a number of factors, including changes in consumer preferences, marketing strategies, and economic factors. One reason for the increase in portion sizes is that many consumers have come to expect larger portions as part of the dining experience. Restaurants, in particular, have been under pressure to offer larger portions at lower prices, in order to compete with other establishments and attract customers. This has led to the proliferation of "value menus" and "supersized" offerings, which often feature larger portions than in the past.
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Read the article “invasive butterfly damages citrus trees, has reached Florida” and write an 8 sentence summary (the article it’s not long) I need help pls
The summary of the article can be found below.
Summary: invasive butterfly damages citrus trees, has reached FloridaThe citrus industry in Florida is facing a new threat from an invasive butterfly species called the Asian citrus psyllid. This insect is known to transmit a deadly citrus disease called "huanglongbing" or citrus greening.
The psyllid feeds on citrus trees and injects the bacteria that causes citrus greening. The disease causes the fruit to be bitter and misshapen, eventually killing the tree. Citrus greening has already caused significant damage to the citrus industry in Asia, Africa, and Brazil, and has been present in Florida since 2005.
However, the recent detection of the invasive butterfly, which feeds on citrus trees and damages the fruit, has raised concerns about the potential for the disease to spread even more rapidly. The butterfly, which is native to Southeast Asia, has already caused significant damage to citrus trees in California, and experts are warning that it could have a similar impact in Florida if not controlled.
Researchers are working to develop new strategies to combat the spread of both the butterfly and the disease, including the use of biological control methods and the development of resistant citrus varieties. However, the scale of the challenge facing the industry is significant, and there are concerns that the long-term impact on Florida's citrus industry could be severe.
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Can someone answer this for me?
Answer:
Outside
Explanation:
The word outside makes the most sense in this sentence.
Hope it helps!
which graph best represents a population that grew exponentially until its carrying capacity was met
Answer:
C
Explanation:
Because its going up and then stops and others are still going up with no limit
Discussion 1. What percentage of asci observed resulted from the fusion of cells from different strains? 2. What percentage of those asci resulting from the fusion of different strains demonstrates crossovers?
During the study of genetics and inheritance, it is important to observe the sexual cycle of fungi to determine the genetic variations within the offspring. In the 1920s, T. H. Morgan and his colleagues used fungal genetics to test the hypothesis of the existence of recombination. For instance, they observed the sexual cycle of the common bread mold, Neurospora crassa, to investigate how crossing-over occurs between homologous chromosomes during meiosis.
As a result of their investigation, Morgan and his colleagues discovered that, during meiosis, four haploid ascospores are produced within a specialized sac called an ascus. These ascospores are produced when two nuclei from two different hyphae (cells) combine and fuse together.
This fusion creates a cell with two haploid nuclei, which subsequently undergoes meiosis to create four haploid ascospores. Hence, an ascus will contain four haploid ascospores produced by a single diploid cell resulting from the fusion of two haploid cells.
The percentage of asci observed that resulted from the fusion of cells from different strains is 100%. This is because the fusion of haploid cells from different strains is essential for the production of a diploid cell that will then undergo meiosis to form four haploid ascospores.
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A storm blew a population of birds to an uncharted island. After many generations, two separate species of birds evolved. One population had very small beaks that could get into the crevices of tree bark to catch insects hiding there. The other population had very large beaks to crack the hard shells of seeds.
Use the sketchpad below to draw a graph of the type of selection curve that these two populations of birds exhibit. Use blue for the original population and red for the population after selection had occurred.
In the exposed example, the original bird population suffered disruptive selection, through which the extreme phenotypes were favored over the intermediate ones.
What is disruptive selection?
Disruptive selection is one of the different types of natural selection, that causes an increase in the two types of extreme phenotypes over the intermediate forms.
Both extreme phenotypes have been favored over intermediated forms, resulting in the development of two groups with very marked differences.
Disruptive selection can lead to speciation, driving evolution. This is why it is also called "diversifying selection."
In the exposed example, the original bird population suffered from disruptive selection. Two new groups (species) emerged from this separation,
the ones carrying small beaks and the ones expressing large beaks.You can learn more about disruptive selection at
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Is it possible that any of the individuals in the pedigree in Figure
14-7 are homozygous dominant?
Answer: Yes
Explanation:
Warm-Up
Active
Describing the Cell Membrane
Which statements describe the cell membrane? Check all that apply.
The cell membrane is very selective.
The cell membrane lets anything enter the cell.
The cell membrane lets anything leave the cell.
The cell membrane is a protective layer surrounding a cell.
O The cell membrane allows waste to leave the cell.
Done
Intro
de activity
Answer:
the 1st one is correct the 4th one is correct and the 6th one is correct
Explanation:
i know because we just had a unit on cells in school
The puppy walks at 2
m/s towards his
mother.
Speed , velocity , or acceleration ?
Answer:Velocity
Explanation:
Because it is going towards the mother and it says how much is going.
PLZ hurry
Which of the following organelles is the site of the Krebs cycle?
chloroplast
Golgi apparatus
ribosome
mitochondrion
Answer:
mitochondrion
Explanation:
I believe the answer is the Mitochondrion :)
What flower only blooms every 100 years?
Answer:
Agave ocahui
Explanation:
The correct answer is the
Agave ocahui grows in Chicago
11. Many plants use brightly colored flowers to attract insect pollinators.
Which is the MOST likely conclusion about a plant that has very small flowers that
are hard to see?
CLE
Answer: Pollen can be blown in the wind which the bees/other pollinators can follow to get to the flowers.
Explanation: Plants rely on bees and other insects to reproduce and so they have adapted, over time, to become more attractive to them. Bees are drawn to plants with open or flat tubular flowers with lots of pollen and nectar. A flower's scent can have particular appeal to bees, and its bright colors or pollen being blown in the wind may lure the bees in.
Explain why it can be difficult to definitively diagnose a disease.
Answer:
There are several known disease processes that are notoriously difficult to diagnose either because they mimic other, milder disease processes or their presentation leads the practitioner away from the correct diagnosis. Frequently this delay or misdiagnosis can lead to devastating consequences.
Explanation:
Over-the-counter medications for acid reflux or heartburn block the production of stomach acid. Which of the following cells are directly affected by this medication?
a. goblet cells
b. parietal cells
c. smooth muscle cells
d. chief cells
Parietal cells in the stomach are blocked from producing acids by medicines for heartburn.
Heartburn, commonly known as GERD, is treatable with over-the-counter medications that lower acidity in the stomach. Acidity is created by the release of HCl in the stomach, and this HCl is required for restricting microbial activity and activating pepsinogen to pepsin (for the digestion of proteins in the stomach). When stomach acid returns into the tube that transports food from your mouth to your stomach, it causes heartburn (esophagus). When food is eaten, the lower esophageal sphincter (a ring of muscle surrounding the bottom of the esophagus) relaxes, allowing food and fluids to flow into the stomach.
Parietal cells (also referred as oxyntic cells) are stomach epithelial cells that release HCl and intrinsic factor. These cells are present in the gastric glands, which are situated in the fundus and body areas of the stomach. Parietal cells are in charge of secreting stomach acid, which assists in digestion, mineral absorption, and bacterial control. The parietal cells in the stomach wall create HCl. As a result, these over-the-counter medications work on parietal cells, lowering heartburn and acid output in the stomach.
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Which of the following is false? Unselected Under normal conditions, blood PO2 affects breathing only indirectly. Unselected Changes in arterial pH resulting from CO2 retention or metabolic factors act through the peripheral chemoreceptors. Unselected When arterial PO2 falls below 60 mm Hg, it becomes the major stimulus for respiration. Unselected Oxygen levels are the primary stimulant of respiration.
Answer:
The sentence that says: Blood PO2 affects respiration only indirectly, IT IS FALSE, since the partial pressure of oxygen gas together with carbon dioxide are factors that DIRECTLY affect respiration.
The sentence that says: Unselected changes in arterial pH as a result of CO2 retention or metabolic factors act through peripheral chemoreceptors. It is FALSE, since the central chemoreceptors together with the peripheral ones can detect the metabolic acidosis generated by the CO2 retention, this is how the CNS receptors capture the CO2 that crosses the blood-brain barrier and stimulates hyperventilation to compensate for this phenomenon and increase the plasma concentrations of partial oxygen pressures.
The sentence that says: in selecting When arterial PO2 falls below 60 mm Hg, it becomes the main stimulus for breathing, IT IS FALSE, since it not only encourages ventilation to promote oxygenation but also activates the renin-angiotensin-aldosterone in order to recover blood volume and thus achieve adequate blood pressure.
In addition, hypovolemia triggers tachycardia and weakening symptoms, which is why the drop in blood pressure is not the main stimulus for breathing.
Explanation:
Breathing is promoted by muscle contraction, medium and high temperatures (that is, in hot or hot climates), partial concentrations of oxygen and carbon dioxide both in the atmosphere and in our blood, and in situations of systemic imbalances such as metabolic acidosis or alkalosis.
what is the name of the condition where blood flows too fast through the arteries.
Answer:
the condition that makes blood flow too fast through the ateries is Coronary artery disease.
Explanation:
It's built on cholesterol, fatty deposits called plaques inside the arteries.
“Some viruses are programmed to reproduce by identifying bacteria, killing them, and assembling new viruses.viruses do not eat the bacteria and do not grow after they are made. Viruses are not alive. Explain two reasons why.”
One of substances that needed to photosynthesis process is ........................
A.
Oxigen
B.
Mineral salt
C.
Glucose
D.
Amylum
PLZ ANSWER
Answer:
C.
Glucose
Explanation:
Pls mark me the brainliest
What dinosaur had 500 teeth?
Answer:
Nigersaurus
Explanation:
Select the correct answer.
When do you see a portion of the Moon passing through the Earth's umbra?
O A total lunar eclipse
OB. penumbral lunar eclipse
Ос.
total solar eclipse
OD.
D. partial lunar eclipse
Answer:
Total Lunar eclipse
Explanation:
Because the umbral shadow is the 'core' of the shadow and is only visable during a total lunar eclips.
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