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andreyandreev [35.5K]
3 years ago
5

What is a limitation of using electron microscopes to view specimens?

Biology
2 answers:
strojnjashka [21]3 years ago
8 0
I think this one is correct: C. You cannot view live specimens because the necessary preparation kills cells. 
quester [9]3 years ago
5 0

Answer:

C

Explanation:

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HELLPP! ITS BIOLOGY
larisa [96]

Answer:

So that in a guinea pig cross in the offspring the recessive trait —long hair— can be observed in 25%, the most probable genotype of the parents is heterozygous Ss.

Explanation:

In guinea pigs, for the characteristic<u> hair length, short hair is the dominant allele and long hair is the recessive one</u>.

In order for 25% of the offspring to express the recessive characteristic, the parents must have a recessive genotype, which can be seen in Punnett's Square:

P: <u>Ss X Ss </u>

<em>Alleles     S     s </em>

<em>S             SS   Ss </em>

<em>s             Ss    ss </em>

Where the offspring is:

  • <em>50% Ss with short hair phenotype </em>
  • <em>25% SS with short hair phenotype </em>
  • <em>25% ss whose phenotype would be long hair. </em>

According to this, heterozygous parents for the characteristic long hair in guinea pigs have a 25% chance of having offspring with long hair.

8 0
2 years ago
Which gland is located closest to the human brain?
Lemur [1.5K]

Answer:

B. The <em>pituitary</em> gland

Explanation:

Can't be the ovaries, they're down by the hips!

Can't be adrenal glands, they're on top of the kidneys!

Can't be the thyroid, that's low on the front of the neck or something like that!

It's B, the pituitary; it's on the base of the brain.

Have a great day!

8 0
2 years ago
Plants need carbon dioxide and _ out of photosynthesis
ICE Princess25 [194]
I'm not sure if this is exactly correct, but to complete photosynthesis, plants need carbon dioxide and water. Usually sunlight as well. If you are supposed to be specific, you could put H2O. I hope I answered your question!
6 0
3 years ago
Read 2 more answers
On the average, most mammals are about: A. 90 B. 50 C. 40 D. 70, percent water
andrew11 [14]
D.) 70% mammals are 70 percent water
7 0
3 years ago
What impact does increased CO2 in the atmosphere have on marine life? Claim, Evidence and reason.
Lisa [10]

It will not help them

Explanation:

5 0
3 years ago
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