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katen-ka-za [31]
3 years ago
6

From the third month to term, the developing human is called a(n):

Biology
1 answer:
Rudiy273 years ago
5 0
Fetus; the developing human is called an embryo for the first three months
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Answer: Open

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Compare Rutherford’s model of the atom with Bohr’s model.
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How was Bohr's atomic model similar to Rutherford's model?

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Which of the following investigators was (were) responsible for the following discovery? In DNA from any species, the amount of
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Answer :Erwin Chargaff   a Biochemist

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He formulated the base paring of double helix of DNA. He reasoned that since the percentage of four  DNA  bases are of this proportions in human;

                                  Adenine=30.9% and Thymine =29.4%;

                                  Guanine=19.9% and Cytosine =19.8%

Then,  the amount of adenine will always be equal to thymine,

And the amount of Guanine equals to cytosine based on this percentages of distribution.  

(Adenine and Guanine are large, molecule of Purines, while thymine and Cytosine are Pyrimidine)  

 

He concluded (although scientist believed, he did not explicitly stated this) that this should be the base paring patterns in DNA molecule. This is the first Chargaff Rule.

His second rule is that the DNA composition, in the relative amount of the four bases Adenine, Thymine, Cytosine and Guanine varies in proportion from one organisms to another. And this is the basis of molecular diversity.

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Water can move freely through the membrane from a higher to a lower concentration in a transportation process called _____.
nignag [31]

Answer: The correct answer for the fill in the blank is osmosis.

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In other words, it is the water movement from an area where its ( water ) concentration is higher to an area where its concentration is lower.

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Fetal lung maturity can be determined from amniotic fluid because the surfactant is PRIMARILY composed of:
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