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3 years ago

2. a) What is gene flow? (3 points)

Biology

1 answer:

Doss [256]3 years ago

7 0

Answer:

Gene flow is the transfer of genes in and out of a population.

2. Geneflow affect the fitness ofva population.

Gene flow within a population can cause an increase in the genetic variation of the population, whereas gene flow between genetically distant populations can reduce the genetic difference between the populations.

Index fossil is any animal or plant preserved in the rock record of the Earth that is use to identify and gate geologic periods.

Explanation:

Gene flow is the transfer of genes or genetic variation in and out of a population.

Gene flow is cause by movement of organisms that reproduce in their new population or movements of gametes. For example, when bees carry pollen from a flower in one location to flowers in another location, the bees are causing gene flow.

Index fossil is any animal or plant preserved in the rock record of the Earth that is use to identify and gate geologic periods. Examples of index fossils include: Ammonites were common during the Mesozoic Era (245 to 65 mya

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Do you think animals pollinate flowers and disperse seeds on purpose or by accident?

Allushta [10]

Answer:

Animals most likely pollinate by accident.

Explanation:

Deer for example, they may graze in the grass. The pollen/seeds could catch onto their fur--and later fall off into a different area when they walk away. They could also eat a plant, and the seeds end up in their feces. Bees for another example don't necessarily <em>mean</em> to pollinate, they just happen to pick up pollen/seeds when they land on a flower for honey.

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3 years ago

Read and analyze the Ecosystem Response section and list the negative feedback mechanisms that keep the bay ecosystem above its

Bess [88]

Answer:

Increase occurs in fresh water input.

Decrease occurs in the salinity of the bay.

Explanation:

The low rate of fresh water input and the presence of high amount of salts in water decreases the population of producers such as grasses in bay ecosystem. Due to this decrease, the population of the marine animals decreases due to the low availability of food for herbivorous organism that lives in the bay. The negative feedback mechanisms will be achieved if increase occurs in fresh water input and decrease occurs in the salinity of the bay.

3 0

3 years ago

Question 10 (1 point)

Alenkasestr [34]

it’s the 3rd option

7 0

3 years ago

Read 2 more answers

Question 9<br> What does it mean if the G2 checkpoint fails during cell Division

viva [34]

Answer:

If the checkpoint mechanisms detect problems with the DNA, the cell cycle is halted, and the cell attempts to either complete DNA replication or repair the damaged DNA.

Explanation:

The G2 DNA damage checkpoint is an important cell cycle checkpoint in eukaryotic organisms that ensures that cells don't initiate mitosis until damaged or incompletely replicated DNA is sufficiently repaired. Cells that have a defective G2 checkpoint enter mitosis before repairing their DNA, leading to apoptosis or death after cell division.

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4 years ago

Microorganisms that live in severe habitats, such as very hot, acidic, or salty environments, are called

Harrizon [31]

Microorganisms that live in severe habitats, such as very hot, acidic, or salty environments are called extremophiles, which are bacteria, archaea and eukaryotes. They are the most successful organisms because they can adapt in any environment. They can live in oceans, rivers, soil, and even inside a human’s body.

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3 years ago