What reproductive advantage do amniotes have over pre- amniotes

within a forest ecosystem, there is a large amount of diversity among members of a warbler species. of the following stages of m

anzhelika [568]

Crossing over occurs between homologous chromosomes, and is closely involved in genetic variation. The stage that most contributes to diversity is stage C, where you can see chromosomes after crossing-over.

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There are different mechanisms involved in producing genetic variation among descendants. These are,

Crossing-over between homologous chromosomes (prophase 1),

Random lining of homologous chromosomes (metaphase 1),

Random fertilization

The Crossing-over events occur between two homologous chromosomes in the equatorial plane and make the daughter cells genetically different from the original one.

The Chiasma is the position where two homologous chromatids interchange genetic information, giving a place for new genetic material or information to be provided to descendants.

After crossing over, homologous chromosomes get separated again.

In the attached imaged there are four different stages of meiosis.

Stage C is the one that contributes the most to diversity.

We can see that crossing over has already occurred between homologous chromosomes, and they have already interchanged segments.

In the image you will see the difference between chromosomes that has gone through the crossing over mechanism, and chromosomes that has not. The difference in color represents segments interchange and variation.

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You can learn more about crossing over at

brainly.com/question/12911831?referrer=searchResults

brainly.com/question/394891?referrer=searchResults

6 0

2 years ago

What do you notice about the data?

denis23 [38]

I noticed that the plant2 is the highest plant.
I hope this helped:)

4 0

2 years ago

What is the purpose of the motor neuron?

Papessa [141]

To send information from the brain or spinal cord to muscles and glands - is the purpose of motor neuron

Explanation:

As part of the central nervous system (CNS), the motor neurons connect the brain and spinal cord to all the muscles and glands present all over the body and innervates them.

Their main function is to transmit nerve impulses from the CNS to the muscles, both skeletal and smooth, and directly controls the movements of the muscles of the body.

A motor neuron is a typical nerve cell with multipolar body. It can be upper of lower motor neuron.

Right from snapping of fingers to movements of hamstrings, all muscular movements functions due to impulse carried by the motor neurons.

Degeneration of the motor neurons leads to neurodegenerative diseases like spinal muscular atrophy or amyotrophic lateral sclerosis.

4 0

4 years ago

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What is the chemical reaction used to study enzyme activity in the lab (lactase breaking down lactose into its monomers). Know t

Bas_tet [7]

Answer: The chemical reaction in this example is Called hydrolysis in the presence of Lactase

Here is a word equation for the hydrolysis of lactose:

lactose + water → galactose + glucose

Explanation: The equation is called <hydro> + <lysis) of these terms refer to water and splitting respectively. So hydrolysis means splitting with water. Enzymes pull out a monomer by examining where the monomers are connected, and placing a water molecule in between them, resulting in the breakage of the bond between the monomers. Here are two picture to represent it.

6 0

3 years ago

Which of these is an example of conserving a non renewable resource

Alika [10]

a.) Ozone depletion
b.) habitat fragmentation
c.) decreased biodiversity
d.) fossil fuel consumption

So answer choices a, b, and c are all results of nonrenewable sources, but an actual example would be fossil fuel consumption or d,), as the fossil fuels are the source and they cannot be reused :)

8 0

4 years ago

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