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Svetllana [295]
4 years ago
9

Darwin's theory predicts that variations can eventually produce a new species. Yet, scientists have never actually seen one livi

ng species give rise to another. Explain why not.
Biology
1 answer:
pav-90 [236]4 years ago
3 0
Because evolution takes insanely long?
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4 years ago
Termites are capable of digesting cellulose and hemicellulose due to the presence of __________.
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It is the presence of Protists. "The bacteria communities seem very stable, but the host and the protozoa gene expression are changing a lot based on diet, The  biology of termite's with the help from microorganisms called protists, are keys to the insect's digestion of woody material,

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4 years ago
Adenine is the last nucleotide at the 3' end of one strand of DNA. It is base-paired with thymine on the other DNA strand. Which
Jlenok [28]

Answer:

The two nucleotides are located on DNA strands that are parallel to each other

Explanation:

Deoxyribonucleic acid, commonly known as DNA, is one of the two types of nucleic acids. It is a molecule composed of a nitrogenous base, pentose sugar and a phosphate group. According to the information given in this question, Adenine is the last nucleotide at the 3' end of one strand of DNA. The following are factual about the nucleotide;

- Since DNA is a double-stranded molecule, the Adenine nucleotide will be base-paired with Thymine nucleotide (complementary base pairing) on the other DNA strand.

- Since complementary DNA strands are opposite to one another, this means that if the adenine has an unlinked 3' hydroxyl group, then the thymine must have an unlinked 5' phosphate group.

- Nucleotides in a DNA strand are joined to one another via a covalent bond called PHOSPHODIESTER BOND. Hence, the adenine and the thymine are each bonded to the previous nucleotide in the strand by a phosphodiester bond.

- In the complementary base pairing between two nucleotide bases, there are two hydrogen bonds between the adenine and thymine nitrogenous bases i.e. A=T.

- DNA strands that make up a molecule are complementary and opposite to one another, hence, they are said to be ANTIPARALLEL.

7 0
3 years ago
You observe a small, nonpolar molecule near a membrane. how would this molecule likely transport across the membrane? you observ
yaroslaw [1]
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4 years ago
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Coal is considered a rock even though it consists of
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Organic material.................
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