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Karo-lina-s [1.5K]
3 years ago
14

The separate lineages leading to dolphins and sharks both evolved streamlined bodies, dorsal fins, and broad tail fins as adapta

tions to efficient locomotion in a marine environment. In this comparison, the bodies and fins of dolphins and sharks are what type of structures?
Biology
1 answer:
goblinko [34]3 years ago
6 0

Answer: Analogous

Explanation:

The bodies of sharks and dolphins are analogous structure. They have common functions but they are originated separately.

The analogous structures are those structures that originate differently and their  functions remains the same or the the differently originated structures functions in a similar way.

Example : body of dolphins and sharks.

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wall

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What does Newton's third law of motion state?
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Explain about Photosynthesis . ?​
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Single strands of nucleic acids are directional, meaning that there are two different ends. What functional groups define the tw
pickupchik [31]

Answer:

The functional groups that define the two different ends of a single strand of nucleic acids are:

B. a free hydroxyl group on the 5' carbon a free hydroxyl group on the 3' carbon

G. a free phosphate group on the 5' carbon

Explanation:

A nucleic acid is a polymer formed of nucleotides that are linked with a phosphodiester bond. The structure of a nucleotide consists on a phosphate group linked to a pentose (ribose in RNA and deoxyribose in DNA) that is also attached to a nitrogenous base. The nitrogenous bases are adenine, guanine, cytosine, thymine (in DNA) and uracil (in RNA).

DNA and RNA are nucleic acids which can be found in a double or single strand presentation.

Nucleic acids are synthesize in the 5’ to 3’ direction, so that is why the convention is that the sequences are written and read in that direction.

The strand of a nucleic acid is directional with an end-to-end orientation, where the 5’ end has a free hydroxyl or phosphate group on the 5' carbon of the terminal pentose, and the 3’ end has a free hydroxyl group on the 3’ carbon on the terminal pentose (ribose/ deoxyribose).

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Why do methane is a gas at room temperature and water is a liquid, even though both molecules are similar in size and mass?
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Answer:

Water can hydrogen bond.

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Intermolecular forces (IMF) are a result of partial charges on the molecular atoms that cause temporary bonds to form between molecules.

Methane is a nonpolar molecule, meaning each atom can only have slight partial charges. The strongest IMF methane participates in are London Dispersion Forces.

Water, however, is a polar molecule, with the hydrogens having strong partial positive charges and the oxygens having strong partial negative charges. This allows water to participate in a very strong IMF called hydrogen bonding. Again, because these partial charges are so strong, the water molecules can form stronger IMFs.

<u>*When molecules have stronger IMFs, they require more energy(heat) to overcome them.*</u>

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