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Andrews [41]
3 years ago
9

How can the addition of non-toxic amounts of fertilizer end up killing fish in a pond?

Biology
1 answer:
Ksivusya [100]3 years ago
6 0
The answer is B. Bacteria blooms and decreased underwater photosynthesis causes asphyxia, killing the fish.

                                                             HOPE THIS HELP!
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In this case of trisomy 18, how many chromosomes would have been present in the first polar body?
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Polar bodies serve to eliminate one half of the diploid chromosome set in meiotic division in the egg, leaving behind a haploid cell. That means that 23 pairs (46) of chromosomes are going to be separated equally, 23 for the polar body and 23 for the egg cell. In case of trisomy 18, the division is not equal. Instead, the egg cell receives 23 +1 chromosomes and the polar body receives 23 - 1= 22 chromosomes.

That chromosome that was misplaced is the chromosome 18.
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3 years ago
What situation is an example of artifical selection
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<u>Answer:</u>

An example situation of artificial selection is "More African elephants today naturally lack tusks compared to the elephant populations 100 years ago, because big game hunters sought elephants for ivory".

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