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77julia77 [94]
3 years ago
9

What area of the brain experiences rapid growth of synapses and subsequent elimination of those synapses that are not used often

during adolescence?
Biology
1 answer:
docker41 [41]3 years ago
7 0

The correct answer is: prefrontal cortex

Synaptogenesis or formation of synapses begins about the 23rd week of gestation. The peak of synapse production is achieved at different periods. The massive overproduction of synapses that occurs in early childhood is followed by a gradual reduction of them also known as "synaptic pruning".  “Synaptic pruning” happens during childhood, and during adolescence.

The brain continues to grow and develop, but the overall number of neurons and synapses are reduced by up to 50%. This is process that is experience driven: unnecessary neuronal structures are removed and replaced by more complex and efficient structures, that are more required to the demands of adulthood.

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Suppose that in unicorns, two autosomal loci interact to determine the type of tail. One locus controls whether a tail is presen
Nina [5.8K]

Explanation:

As you can see in the picture below, this is a dihybrid cross with a twist.

We can accomplish that mutually parentages are heterozygotes for both characters because the genotypes are  

9 unicorns with curly tails (shown in green)

3 with straight tails (shown in red)

3  curly tales trait carriers with no tail (shown in dark blue)

1  straight tail trait carriers with no tail ( shown in light blue)

If this was an ordinary case of the dihybrid cross, we would get a 9:3:3:1 phenotype ratio.

However, since the first trait, the presence of the tail, is affecting the other trait, the trait texture, the ratio is altered.

\frac{1}{4} of the offspring (genotypes tt C_   and tt SS) has no tail, therefore we cannot observe the texture of the tail (some of the tailless individuals have Curly alleles -blue squares marked with green, some of them have Straight alleles -blue square marked with red ).

Therefore, the altered ratio is  \frac{1}{2} curly tails,\frac{1}{4} straight tales, \frac{1}{4} tailless

6 0
3 years ago
What substances are used up as the reactants in cellular respiration?
lana66690 [7]
The cellular respiration happens in the mitochondria. During the cellular respiration, glucose and oxygen are the reactants during this process and the main product of this process is ATP, with waste products carbon dioxide and water. Therefore, the correct answer would be option B. O2 (oxygen) and C6H1206 (glucose).
7 0
3 years ago
Read 2 more answers
Place the following materials in the order in which they are likely to fossilize. Begin with the material that is most likely to
marusya05 [52]

Answer: correct order--->

1)mammal teeth

2.)bones of an adult mammal quickly buried

3.) bones of an adult mammal left on the surface

4.)soft body parts of any animals

Explanation:

Fossilization is the ability of an organism to be preserved and remain unaltered for a very long time. Through research , it has been found out that Harder  parts of the body tend to remain preserved for a long time  because they  naturally have minerals deposited in them and may only be reduced,  but the softer part or tissues do not get preserved for a long time because being made up of polymer can be disintegrated easily by natural biological and physical processes.

The order of which material will likely fossilize is

1.)mammal teeth

2.)bones of an adult mammal quickly buried

3.) bones of an adult mammal left on the surface

4.)soft body parts of any animals

Reason,

--Teeth and bones biologically contain calcium but the teeth is more tougher and durable than the bone, Even when a  body is decomposed, the teeth most times are not  affected at all.

Bones of an adult mammal left on the surface will decompose faster than the one buried because of the biological (natural decomposing ) and physical processes(temperature, wind, sunglight, rainfall ) which will both act on it at the same time because of its exposure.

- soft body parts of any animals will decompose fastest as bacteria will feed on it immediately since it lacks minerals that can elongate preservation.

5 0
3 years ago
The overall process of photosynthesis can be written as the equation:
Ann [662]

Answer:

the overall process of photosynthesis is written by the equation B.

3 0
3 years ago
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WILL GIVE YOU BRAINIEST AND MORE.
juin [17]

Answer:

Humans are part of decrease of biodiversity because we kill animals. When we kill animals there is less animals and which means less reproduction.

Explanation:

4 0
3 years ago
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