Meiosis I and II contribute to genetic variation through two key processes: crossing over during Prophase I and independent assortment during Metaphase I.
In crossing over, homologous chromosomes exchange segments of DNA, creating new combinations of genetic information, this increases the diversity of alleles present in the resulting gametes. Independent assortment occurs when homologous chromosome pairs line up randomly along the metaphase plate during Metaphase I. This random orientation leads to a variety of genetic combinations in the daughter cells following Anaphase I and Telophase I.
Meiosis II, although not directly responsible for genetic variation, ensures that each resulting gamete contains a unique, haploid set of chromosomes. This complements the genetic variation produced in Meiosis I and ensures that when gametes combine during fertilization, offspring will have a diverse genetic makeup. Overall, Meiosis I and II play crucial roles in promoting genetic variation and maintaining a diverse, adaptable population.
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Influenza is a bacterial infection whose symptoms include sore throat and fever. True or False
Answer: Im positive is true i hope this helps
Explanation: i leanded this last year
Eukaryotic chromosomes are composed of a complex of 60% protein and 40% DNA. The name of this chemical complex is
a histone complex
chromatin
a histamine complex
Sister chromatids
Eukaryotic chromosomes are composed of a complex of 60% protein and 40% DNA. The name of this chemical complex is Chromatin.
What is chromatin? Chromatin is the mixture of DNA and proteins that make up the chromosomes of eukaryotic cells. It can be condensed into tightly packed structures (such as the visible chromosomes seen during cell division) or uncoiled and spread throughout the nucleus. It has been estimated that the proportion of DNA and protein in chromatin is approximately 40% and 60%, respectively.What are histones?Histones are a group of proteins that are essential components of chromatin. They are alkaline proteins and are highly conserved in eukaryotes. Histones play a critical role in the organization of chromatin by wrapping DNA around their positively charged N-terminal tails to form nucleosomes. Chromatin is composed of repeating nucleosome units linked by the DNA that connects them. In other words, the name of the chemical complex is chromatin.
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what are examples of virtual water?
NEED ANSWER ASAP!!
How are air temperature and air pressure related?
Low air temperature causes the air particles to be packed together, creating high air pressure.
Low air temperature causes the air particles to spread out, creating low air pressure.
High air temperature causes the air particles to rise, creating low air pressure.
High air temperature causes the air particles to stay close to the ground, creating high air pressure.
The correct answer is:
High air temperature causes the air particles to rise, creating low air pressure.
Low air temperatures cause air particles to clump together, creating high atmospheric pressure.
Air temperature and air pressure are related because air pressure is directly proportional to temperature. When air is heated, its particles become more energetic and move faster, creating more space between them, which leads to a drop in atmospheric pressure. Conversely, when air is cooled, its particles become less active and move more slowly, bringing them closer together, resulting in higher atmospheric pressure. Therefore, high air temperature produces low air pressure and low air temperature produces high air pressure.
So, the correct answer is: High air temperature causes the air particles to rise, creating low air pressure.
What is pressure?Pressure is the amount of force applied per unit of area. It is a scalar quantity, meaning it has magnitude but no specific direction. In the context of gases, pressure is the force exerted by the particles in the gas against the walls of the container it is in. It can also be applied to liquids and solids. The standard unit of pressure is the pascal (Pa), but other common units include pounds per square inch (psi) and atmospheres (atm).
Here,
High air temperature causes the air particles to rise, creating low air pressure. Conversely, low air temperature causes the air particles to be packed together, creating high air pressure.
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A teacher has two cubes of sugar that are both the same size and shape. He adds cube A to a beaker filled with 100 mL of water, and the cube completely dissolves in the water. He then places cube B on a glass dish over a flame. He keeps the dish over the flame until cube B has turned completely black. Once cube B has cooled off, he adds it to another beaker filled with 100 mL of water. Cube B does not dissolve in water.
What does this demonstration indicate?
Answer:
Burning sugar results in a chemical reaction
Explanation:
Flammability, odor, and density are just a few examples of characteristic properties of a substance. A chemical reaction occurs when molecules interact with one another and the molecules change. For example burning sugar results in a chemical reaction because the properties of cube B changed when it was burned. This change in solubility shows that cube B must be a different substance than cube A because of the chemical reaction that occurred when cube B was burned.
Answer:
Burning sugar results in a chemical reaction
Explanation:did it on study island
Yeast is a unicellular organism that undergoes fermentation, a type of anaerobic respiration, to convert sugar into alcohol and carbon dioxide. In an experiment testing yeast activity, Sakurapoured equal amounts of warm water into two bowls. She added 1 teaspoon of sugar to only one bowl. Next, she added 1 teaspoon of yeast to each bowl. Within a few minutes, bubblesstarted to rise to the top of both bowls. Which of the following best explains why Sakura observed more bubbles produced in the bowl with sugar than in the bowl without sugar?A.Sugar provided the chemical energy for driving photosynthesis, resulting in greater production of oxygen bubbles.B.Sugar provided the light energy for driving cellular respiration, resulting in greater production of oxygen bubbles.C.Sugar provided the light energy for driving photosynthesis, resulting in greater production of carbon diaxide bubbles.D.Sugar provided the chemical energy for driving cellular respiration, resulting in greater production of carbon dioxide bubbles.
The correct answer is D. Sugar provided the chemical energy for driving cellular respiration, resulting in greater production of carbon dioxide bubbles. Sugar is a chemical used by heterotrophic organisms to perform cellular respiration, which ultimate product is carbon dioxide (CO2).
Describe TWO features of natural selection that lead to the spread of antibiotic resistance in a population over many generations. Give ONE reason that the development of antibiotic resistance is an example of evolution.
Mutations are inheritable changes that can beget a population to come resistant to certain antibiotics.
This is because mutations can alter a gene that codes for an antibiotic target, making the target inapproachable to the antibiotic. 2. Selection Pressure Selection pressure is the discriminational survival of individualities in a population due to their capability to repel antibiotics. This means that individualities with advanced situations of antibiotic resistance have a advanced chance of survival, performing in the spread of antibiotic resistance throughout the population. Reason The development of antibiotic resistance is an illustration of elaboration because it involves the selection of individualities with certain traits( antibiotic resistance) over time, performing in the spread of these traits throughout the population.
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A population may become antibiotic-resistant through mutations, which are heritable alterations.
This is due to the possibility of mutations changing a gene that codes for an antibiotic target, rendering it resistant to the antibiotic. 2. Selection Influence The discriminatory survival of individuals in a community due to their resistance to antibiotics is known as selection pressure.
This has the effect of spreading antibiotic resistance across the population since individuals with advanced levels of antibiotic resistance have a higher probability of surviving. Reason Because it entails the selection of individuals with certain features (antibiotic resistance) over time, resulting in the spread of these traits across the population, the evolution of antibiotic resistance is an example of elaboration.
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What is the primary role that plants play in the carbon cycle?
the prime role is that plants take carbon and it helps to make our life clean and stop increasing carbon that cause global warming and plants give us oxygen and take carbon by photosynthesis to make their food and when plants die maybe it turns to fossil fuel that be made from carbon like coal and petroleum
when the introduction of gambusia results in the sudden abundance of algae, called an algal bloom, on which food source is gambusia likely to be concentrating?
When the introduction of gambusia results in the sudden abundance of algae, also known as an algal bloom, gambusia is likely to be concentrating on consuming the algae as their food source.
Gambusia, also known as mosquitofish, are small, freshwater fish that are known to be opportunistic feeders, meaning they will consume whatever food source is available to them.
Algae is a common food source for many species of fish, including gambusia, and is often abundant during algal blooms.
Gambusia are also known to feed on mosquito larvae, which can be found in stagnant water. However, during an algal bloom, the abundance of algae may make up the majority of their diet.
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for animals housed outdoors, any shelters provided to them should be:
Animals housed outdoors should be provided with shelters that offer protection from the elements and promote their well-being.
In biology, the term "animal" refers to a diverse group of multicellular organisms that belong to the kingdom Animalia. Providing shelters for animals housed outdoors is essential to ensure their welfare and safety. These shelters should protect them from extreme weather conditions such as excessive heat, cold, rain, or snow. The shelters should be designed to offer shade and insulation, preventing the animals from overheating or becoming too cold. They should also be structurally sound and resistant to harsh weather, providing a secure environment for the animals.
Additionally, the shelters should be spacious enough to accommodate the animals comfortably, allowing them to move around and lie down without restrictions. Adequate ventilation is also crucial to maintain good air quality and prevent the buildup of moisture or odours inside the shelter. Overall, shelters for animals housed outdoors should prioritize their protection, comfort, and well-being.
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The wells that contain the DNA samples are placed next to the negatively charged electrode in the electrophoresis box (chamber) because _______. Group of answer choices DNA strands have both a positive and a negative charge DNA is negatively charged DNA is positively charged DNA has no electrical charge
Answer:
DNA is negatively charged
Explanation:
Electrophoresis: In biology, the term "electrophoresis" is described as one of the different laboratory technique that is being utilized to separate protein molecules, DNA, and RNA one the basis of their electrical charge and size. Therefore, a specific amount of "electric current" is being used to move different molecules that are required to be separated through a "gel". The given gel contains pores that generally works like a "sieve" and thus allows every small molecule to proceed faster as compared to the larger molecules.
DNA stands for "deoxyribonucleic acid" is determined as a long molecule that ought to contain an individual's unique "genetic code" and generally carried information associated for making proteins in an individual's body.
In the question above, the correct answer is "DNA is negatively charged".
The samples of DNA are placed next to the negatively charged electrode in the electrophoresis as DNA is negatively charged.
What is electrophoresis?It is a laboratory technique, which is used to distinguish RNA, DNA or molecules of protein on the basis of their electrical charge and size. In the process, an electric current is utilized to move molecules to be separated via a gel. The gel comprises pores that functions as a sieve, which permits smaller molecules to move faster in comparison to larger molecules.
DNA is a negatively charged molecule, thus, when it is used in the process of electrophoresis, the migration of DNA will take place towards the positively charged electrode. Through the gel, the DNA with shorter strands will move more briskly in comparison to the longer strands leading to the formation of fragments being aligned in order of size.
Thus, the samples of DNA are placed next to the negatively charged electrode as they are negatively charged.
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which process pertains to cellular respiration A. captures energy B. releases oxygen C. only carried out by producers D. releases carbon dioxide
Answer:
D. releases carbon dioxide.
Explanation:
Viruses are often named by
What is the coding region of DNA called? Explain.
a- A gamete
b- A allele
c- A sister chromatid
d- A gene
Answer:
D-Gene
Explanation:
Because of the protein it get's. When it gets the protein it needs then they develop the gene therapy.
At __________, the mature follicle (graafian follicle) ruptures and the ripe ovum is expelled into the abdominal cavity, where it will soon be picked up by the fallopian tube.
Answer:
Ovulation
Explanation:
Ovulation is a physiologic process defined by the rupture and release of the dominant follicle from the ovary into the fallopian tube where it has the potential to become fertilized.
In gymnosperms and angiosperms, spores are produced __________________ the plant via _______________.
In gymnosperms and angiosperms, spores are produced within the plant via meiosis.
Gymnosperms and angiosperms produce spores in specific structures called sporangia. In these plants, spores are produced inside the sporangia and are released from the plant to disperse and eventually germinate into a new plant.
However, unlike mosses and ferns, the spores of gymnosperms and angiosperms do not play a direct role in the formation of the adult plant. Instead, the spores of these plants give rise to tiny structures called gametophytes, which produce the male and female reproductive cells.
The reproductive cells produced by the gametophytes eventually fuse to form a zygote, which develops into the embryo of the new plant. This process is known as sexual reproduction, and it is the primary mode of reproduction in gymnosperms and angiosperms.
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Can Caffeine specifically Coca Cola affect plant growth?
Answer:
Coca-Cola does not cause for plants to grow taller and grow more leaves. In the end Coca-Cola is very bad for plants and causes for them to dry up faster, die quicker, grow smaller and not to grow as many leaves.
Explanation:
hope this helps:)
the tube that carries spermazotoa from the testis is called the __________.
Answer: A vas deferens
Explanation:
You were looking at a cell under a microscope. It had a large central vacuole, a nucleus, a cell wall and mitochondria. You concluded that it is a:
Responses
Eukaryotic animal cell
Eukaryotic animal cell
Hybrid of a plant and animal cell
Hybrid of a plant and animal cell
Eukaryotic plant cell
Eukaryotic plant cell
Prokaryotic bacterial cell
On the presence of a large central vacuole, a nucleus, a cell wall, and mitochondria, the cell you were looking at is most likely a eukaryotic plant cell. Option C is correct.
Eukaryotic cells are more complex and larger than prokaryotic cells, which lack a nucleus and most organelles. Eukaryotic cells are found in animals, plants, fungi, and protists.
However, Eukaryotic cells have a nucleus, membrane-bound organelles such as mitochondria, and a cytoskeleton. Plant cells, in addition to these organelles, also have a cell wall, a large central vacuole, and chloroplasts for photosynthesis. The presence of a large central vacuole, a cell wall, and mitochondria in the cell you observed suggest that it is a plant cell.
Hence, C. is the correct option.
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--The given question is incomplete, the complete question is
"You were looking at a cell under a microscope. It had a large central vacuole, a nucleus, a cell wall and mitochondria. You concluded that it is a: Responses A) Eukaryotic animal cell B) Hybrid of a plant and animal cell C) Eukaryotic plant cell D) Prokaryotic bacterial cell."--
What is the lowest level of organization of the biosphere, or the one that
has the fewest members?
Answer:
Organism
Explanation:
the answer is Organisms
Define the term, photosynthesis.
Answer:
The term photosynthesis is the process in which plants and other organisms capture sunlight and converts it into energy.
Answer:
Hey there
here's ur answer
Explanation:
The process by which plants use sunlight, water and carbon dioxide to create oxygen and energy in the form of sugar
Hope it helps u ✌
The Newfoundland moratorium on cod fishing was unsuccessful because _______.
A)
fishing capacity increased after the moratorium
B)
political decisions were made against scientific evidence
C)
fishing resumed almost immediately following the moratorium
D)
fishing went as far as destabilizing the ecosystem
E)
all of the above
Answer:
D
Explanation:
Just took the quiz
The Newfoundland moratorium on cod fishing was unsuccessful because fishing went as far as destabilizing the ecosystem (Option D).
What was the Newfoundland moratorium?The Newfoundland moratorium was a legal issue where the Canadian fed government banned cod-fishing along its east coastline.
This moratorium was critical for maintaining biodiversity levels in the geographic area.In conclusion, the Newfoundland moratorium on cod fishing was unsuccessful because fishing went as far as destabilizing the ecosystem (Option D).
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there are two kinds of cellular respiration: aerobic respiration, which uses oxygen, and anaerobic respiration, which does not use oxygen. what is produced by both aerobic and anaerobic respiration?
Both aerobic and anaerobic respiration produce energy in the form of ATP (adenosine triphosphate). In aerobic respiration, oxygen is used as the final electron acceptor in the electron transport chain, producing a total of 36-38 ATP molecules per glucose molecule.
This process occurs in the mitochondria of eukaryotic cells. On the other hand, in anaerobic respiration, an inorganic molecule such as nitrate, sulfate or carbon dioxide is used as the final electron acceptor, producing a much smaller amount of ATP (2-4 ATP molecules per glucose molecule) compared to aerobic respiration. Anaerobic respiration occurs in the absence of oxygen, such as in some bacteria, yeast, and muscle cells during strenuous exercise. In addition to ATP, both aerobic and anaerobic respiration produce waste products. In aerobic respiration, carbon dioxide and water are produced, while in anaerobic respiration, various organic and inorganic molecules can be produced depending on the final electron acceptor used.
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Which of the following can be considered a function of the paranasal sinuses?
A) The paranasal sinuses are passageways for nerves to pass through.
B) Sinuses take away a minimal amount of strength from bones while reducing the weight of bones.
C) Sinuses have rough patches that aid in muscle attachment.
D) Sinuses are often referred to as vestigial, anatomical features with no know function
The function of the paranasal sinuses can be summarized as B) Sinuses take away a minimal amount of strength from bones while reducing the weight of bones.
The paranasal sinuses are air-filled cavities located within the skull and surrounding the nasal cavity. Their main function is to reduce the weight of the skull bones without compromising their strength. By being filled with air, the sinuses decrease the overall weight of the skull, making it easier for the head to move and reducing the strain on neck muscles.
Additionally, the sinuses also contribute to the resonance and quality of the human voice. They act as resonating chambers, modifying the tone and timbre of sound produced by the vocal cords.
While the sinuses do not serve as passageways for nerves (Option A), aid in muscle attachment (Option C), or have no known function (Option D), their role in reducing skull weight and influencing voice resonance is well established.
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How many of each molecule is there (H2O and co2 molecules)
6h2o + 6co2
Answer:
Six of each.
The heart has 4 valves. Explain how one of them works
Explanation:
The heart has four valves - one for each chamber of the heart. The valves keep blood moving through the heart in the right direction. The mitral valve and tricuspid valve are located between the atria (upper heart chambers) and the ventricles (lower heart chambers)
Through interaction with the hypothalamus, the ______ gland detects when the optimal level of hormones has been reached and maintains it with additional gonadotropin secretions.
Through interaction with the hypothalamus, the pituitary gland detects when the optimal level of hormones has been reached and maintains it with additional gonadotropin secretions.
What are hormones?Hormones are molecules which serve as chemical messengers in the body.
The site of action of hormones are at far not close to where they are secreted, and are therefore, transported in blood to their site of cation.
Hormones are secreted by endocrine and exocrine glands.
The master gland of the body is the pituitary gland. The hormones secreted by the pituitary gland controls the activities of other hormones.
In conclusion, hormones are chemical messengers in the body.
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where does the energy supplied by ATP. come from
Answer:
Glucose
Explanation:
Answer:
Glucose
Explanation:
Because glucose converts to ATP by the process of cellular respiration.
the cone-shaped region of the cell body where the axon originates and where action potentials are generated is known as?
The cone-shaped region of the cell body where the axon originates and where action potentials are generated is known as the axon hillock.
The axon hillock is a specialized region of a neuron that plays a critical role in the initiation of action potentials, which are electrical signals that propagate along the axon to transmit information between neurons. It serves as the junction between the cell body and the axon and contains a high density of voltage-gated ion channels, which are responsible for generating and propagating action potentials.
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g the synthesis of an enzyme in response to a cellular need is called a. allosteric production. b. enzyme induction. c. feedback control. d. biofeedback.
Answer: i think the answer is B enzyme
Explanation: i hope this helps