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Annette [7]
3 years ago
6

12. In our somatic (body) cells, we have ___________ chromosomes, but in our sex cells (sperm & eggs), we have half the numb

er of chromosomes, which is ____________ chromosomes
Biology
1 answer:
Sliva [168]3 years ago
5 0

Answer:

12. In our somatic (body) cells, we have 2N chromosomes, but in our sex cells (sperm & eggs), we have half the number of chromosomes, which is N chromosomes

Explanation:

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Travka [436]

Answer:

The presence of cholesterol in the plasma membranes of some animal cells <u>enables the membranes to stay fluid when cell temperature drops</u>.

Explanation:

Cholesterol is an essential lipid in the basic structure of cell membranes. The membranes must have a fluid structure so that the proteins integrated in them can move ''horizontally'' to interact with their ligands and with other proteins. With excess saturated fat the membranes become rigid, but only with the necessary unsaturated fat the membranes are extremely fluid, and very sensitive to changes in temperature. Cholesterol stabilizes the structure of the membranes; preventing the collapse and crystallization between lipid chains that would lead to loss of fluidity and excessive rigidity in the membrane. By decreasing the temperature; as temperatures drop, fluidity decreases, an effect that partially counteracts the presence of cholesterol.

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3 years ago
Multiple lunar eclipses occur each year. How is it possible that each one can look different than the others? Explain.
Mrrafil [7]

Answer:

necause it orbits the earth and it has light facing on one side at all times and as it orbits the earth it will starte showing a bit of its dark side

Explanation:

5 0
3 years ago
What kind of organism is a zooxanthellae
insens350 [35]
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3 years ago
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A color-blind (X-linked recessive) human with Klinefelter syndrome has parents both of whom have normal color vision. 4a. From w
sineoko [7]

The extra X chromosome is received from mother.

<h3><u>Explanation</u>:</h3>

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Here both the parents are normal in terms of colour vision. So the father cannot have the gene of colour blindness because if it was present, then father would have been colour blind because he has only one X chromosome per cell. So its present in mother who is heterozygous in terms of colour blind gene. So the extra X chromosome also came from her which made the presence of two defective X chromosomes in the offspring and made it colour blind.

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3 years ago
Dichotomous keys and branching diagrams organize different types of information about classification. How are these tools used d
Ivenika [448]
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3 years ago
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