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dedylja [7]
3 years ago
6

Discuss how the cell nuclei evolved in prokaryotic and eukaryotic cells.

Biology
1 answer:
erastova [34]3 years ago
4 0
The main point here is discuss about the structure of the nucleus in eukaryotes as an example we can use animal nuclei. compared to eukaryotes prokaryotes have simplier structure. we can talk about the arrangement of DNA in chromosomes while in prokaryotes DNA is circular in the cytoplasm. this helps during cell division such as mitosis and meiosis. in prokaryotes division occurs by binary fission. this can be an advantage in order to know the difference in genetic material in eukaryotes while binary fission ensures that all cells are genetically identical to each other
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Radda [10]
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If it crossed with a black fur guinea pig and gave 5 black fur offsprings, there is a good chance that the black fur parent is homozygous dominant (BB).
The Punnett square would be as follows:

       B      B
b     Bb   Bb
b     Bb   Bb
So they are all heterozygous black fur offsprings.

However, it is not impossible that the black fur parent be heterozygous, namely

       B      b
b    Bb   bb
b    Bb   bb

Giving a 50% chance on each colour.  Thus it is possible (with probability 1/32) that all five offsprings are heterozygous black fur if one of the parents was heterozygous.

In the second case, a homozygous recessive and a homozygous dominant parent will never give a white offspring.  So it is sure that the black fur parent is heterozygous, with the following Punnett square:

       B      b
b     Bb   bb
b     Bb   bb

With a 50% probability for each of Bb (black fur) and bb (white fur).
the distribution 4,3 demonstrates this perfectly.
6 0
3 years ago
Which part of agricultural soil contains relatively few organisms and organic material, but also has an accumulation of leached
notsponge [240]

Answer: b or d

Explanation:

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You engineer yeast cells that express the M cyclin during S phase by replacing the promoter sequence of the M cyclin gene with t
Vilka [71]

Answer:

(c) G1 cyclins will be expressed during the S phase

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Why is diabetes an endocrine disease?​
Inessa [10]

Answer:

Hope this helps!

Explanation:

How does the endocrine system cause diabetes?

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amid [387]
The Red Blood Corpuscles in the blood take up the oxygen to supply it to different cells in the body. They do not have a nucleus to carry much oxygen and to go through the thinnest capillaries and narrow spaces. They do not have mitochondria so that they do not use up the oxygen or energy for themselves.
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