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mina [271]
3 years ago
11

How are freshwater environments, such as rivers and lakes, being impacted by human activity

Biology
1 answer:
Rama09 [41]3 years ago
7 0

Answer:

they are being impacted negativily and this is what they are being impacted by industrial dumping, pesticides, and agricultiural fertilizer can end up in rivers, lakes, streams, etc.  

Explanation:

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Explain how this experiment supports the statement, "The cell is the building block of life."
vitfil [10]

Answer: Can you, please, explain what experiment?

Explanation:

4 0
3 years ago
Color in poison dart frogs is controlled by a single gene with multiple alleles. A blue poison dart frog that is heterozygous fo
8_murik_8 [283]

Answer:

Cb>Cy>Co>Cr

Explanation:

First of al we need to do the Punnett square. As a result we get the genotypes:

CyCb

CyCr

CoCb

CoCr

Because there are no red frogs, red is the least dominant as it isn't expressed in any genotype.

Half of the progeny are blue and half of the possible genotypes contain the blue allele meaning that blue is expressed in all genotypes. This means that blue is the most dominant.

The only alleles left are yellow and orange. We can deduce that yellow is more dominant than orange because one of the parent frogs is yellow and contains the genes for yellow and orange.

As a result blue is the most dominant, yellow is the second most dominant, orange is the third most dominant and red is the least dominant.

7 0
3 years ago
PLZ HELP PUNNETT SQUARES
Ivahew [28]
1st row, 3rd column: t
2nd row, 1st column: t
2nd row, 3rd column: Tt

The ratio of homozygous to heterozygous offspring is 1:3
8 0
2 years ago
Our heart is made up of three chambers, called the atria and the venucia.
igor_vitrenko [27]

Answer:

false

Explanation:

3 0
3 years ago
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The smithsonian obtained many specimens and artifacts from which groundbreaking hybrid expedition
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The 1912 worlds fair I think
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