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Whitepunk [10]
3 years ago
12

Of the following chemicals, which is least likely to be biologically magnified as it moves through food webs?a.radioactive isoto

pesb.mercury compoundsc.nitratesd.PCBse.DDT
Biology
1 answer:
Arlecino [84]3 years ago
4 0

Answer:

e.DDT

Explanation:

DDT is biologically magnified and concentrated as it moves through the food web. This increase in concentration is due to Metabolism of DDT which excretes more slowly than the nutrients which moves from one trophic level to  next. so DDT accumulates in the body especially in the Fats.

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What phenomenon occurs in females as a result of x-chromosomes inactivation
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This happens early in embryonic development in females, where one of the two X-Chromosomes is randomly (and permanently) inactivated, as you said, in cells other than egg cells.

This phenomonon is actually called X-Inactivation.

X-Inactivation make sure that females, just like males, have a single functional copy of the X Chromosome in each and every one of their cells in their body.

Glad I could help, byee now

3 0
3 years ago
The cell cycle of yeast cells grown in the nutrient-poor environment is approximately what percent of the cell cycle of yeast ce
vova2212 [387]

Answer:

Upon nutrient limitation, budding yeast will produce daughter cells less than 20% of the mother cell size. This asymmetric division may select for growth functions that are efficient over a larger range in cell sizes, such as exponential growth. In turn, efficient growth over a large size range lessens the pressure to have precise size control.

Explanation:

In wild-type cells growing in nitrogen-rich medium, the size threshold to enter mitosis is high, and the G1/S size control is cryptic because cell division produces daughter cells with a size greater than the minimum required to initiate S phase. In these conditions, G2 is long and G1 is short. However, the cell size threshold to enter mitosis is greatly reduced when wild-type cells are shifted to medium with a poor nitrogen source, such as minimal medium with proline, isoleucine, or phenylalanine. In these conditions, wild-type cells initiate mitosis at a reduced cell size, generating two daughter cells that are smaller than the critical size threshold required to progress through G1/S

3 0
3 years ago
Plz help me well mark brainliest if correct!!
sammy [17]

Answer:

B)

Explanation:

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3 0
3 years ago
Which of these is not a human activity that impacts the environment?
bonufazy [111]
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6 0
2 years ago
What is productivity and what is the difference between net and gross productivity
agasfer [191]

Answer:

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Explanation:

3 0
2 years ago
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