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Agata [3.3K]
4 years ago
14

In a comparison of the stages of meiosis to the stages of mitosis, which stages are unique to meiosis and which stages have the

same events in both meiosis and mitosis?
Biology
1 answer:
Artist 52 [7]4 years ago
4 0

Answer:

The unique things happen in meiosis are there is no DNA replication, the time taken for completion is longer. This is reductional division having two divisions i.e. meiosis-1 and meiosis-2. The meiosis-2 division is similar to the mitotic cell division.

Explanation:

The meiotic cell division is reductional while the mitosis is equational division. The meiotic cell division occurs in germ cells while the mitotic cell division has seen in body cells. The meiosis has certain peculiarities that are not found in mitotic cell division.  

The meiotic cell division takes longer time than the mitosis. It can be taken years to complete. Mitotic cell division takes one or two and a half hours to complete.  

There is no DNA replication in both the meiotic cell division as it reduces the number of chromosomes. In mitosis during the cell cycle DNA replication occurs.  

In meiosis, the exchange of genetic materials occurs between the homologous chromosomes takes place in prophase-1 of the meiosis. The prophase-1 is the longest stage and have 5 substages.

Another peculiarity in meiosis is the daughter cells formed during telophase-1 of the first division, directly enters into the metaphase-2 of second meiotic division.

The second division of meiosis-2 is similar to the mitotic cell division. The only difference is mitosis produces 2n cells as output while the end of the second meiotic division results in 'n' number of cells.

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describe why rocks found at the bottom of the river are smooth and flat.Please in your own words,My teacher would get mad
oksano4ka [1.4K]

The rocks found at the bottom of a river smooth and flat because those are collides with each other.

Explanation:

At the bottom of the river, the rocks which are found are very smooth and the shape of these rocks are flat because the rocks at the bottom collide with each other.

This results in the chipping off parts of the rocks and this results in the surface of the rock to become smooth and becoming flat. Moreover the sand found at the bottom acts as a sand paper creating resistance and smooth-ens the rocks at the bottom of the river.

7 0
2 years ago
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The descriptions below explain two ways that water is used by plants on a sunny day.
iogann1982 [59]
The answer is A.
During the process of transpiration the plant sucks the water up through its roots this is a physical change. But, it only goes through a chemical change after the process of photosynthesis because the plant will use sunlight, carbon dioxide, and water and convert it into glucose and oxygen.
7 0
3 years ago
Select all of the answers that apply.
m_a_m_a [10]
A. And D. are the answer aka the first and last one 
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3 years ago
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How is the muscularis externa modified in the stomach? how is the muscularis externa modified in the stomach? the muscularis ext
Mkey [24]
The correct layer is "<span>there is an additional third oblique layer of smooth muscle".

The muscularis externa of the stomach is purely smooth muscle (no skeletal muscles or other striated muscles) composed of three layers; inner oblique, middle circular, and external longitudinal layers. Plicae circularis can only be found in the intestines, not in the stomach.</span>
5 0
3 years ago
IPSPs are the result of: a. decreasing membrane conductance to potassium neurotransmitter b. binding to ligand-gated ion channel
bearhunter [10]

IPSPs are the result of:

a. decreasing membrane conductance to sodium

b. decreasing membrane conductance to potassium

c. inhibitory neurotransmitter entering the postsynaptic cell

d. neurotransmitter binding to ligand-gated ion channels that are chloride selective

Answer:

d. neurotransmitter binding to ligand-gated ion channels that are chloride selective

Explanation:

IPSP refers to inhibitory postsynaptic potential (IPSP). It occurs when the neurotransmitters released from the axon terminals of the presynaptic neurons bind to and open the chloride ion channels. This allows the entry of chloride ions into the neuron making the inside of the membrane even more negative. This does not allow firing of the action potential. The postsynaptic neuron is said to be hyperpolarized. Therefore, IPSP results from hyperpolarization of postsynaptic neurons by the opening of ion channels such as chloride channels.

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3 years ago
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