The exact boundaries, limitations, and meaning of species is now known and agreed upon universally.

1 answer:

6 0

False, it's extremely difficult for scientists to agree upon what makes relatively close species different when it comes to extremely technical factors. Whether something is simply a single deformation of a specimen/family or the discovery of an entirely new species. However there are species that are concretely defined, like humans, and it's unlikely that evolution will introduce a new version of humanity any time soon - but if it came to be that 5000 years in the future humans were genetically a world different than how we are today, I suspect it would be a long argument on whether or not they should be classified as a new species by their scientific leaders.

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Question 4

Colt1911 [192]

Question 4

Which of the following would be considered a form of active transport?

o the movement of oxygen molecules from high concentration in the blood to low concentration in the cell.

O the movement of carbon dioxide from high concentrations in the cell to low concentrations in the blood.

o the movement of glucose into the cell down its concentration gradient,

o the movement of sodium atoms from low concentration in the cell to higher concentrations outside the cell.

8 0

3 years ago

Suppose you traveled back in time and located the first animals to have evolved feathers. You found that these animals were tree

Nana76 [90]

Answer:

Feathers initially evolved in a role associated with sexual selection.

Explanation:

In species where only males had feathers, these feathers can be considered to have evolved into a role associated with sexual selection. This is because in these species, males used their feathers as a sexual attraction for females, in this case, females chose the males that had more attractive feathers to mate and generate new individuals for the species. An example of this can be seen in the peacock, where the tail with lush feathers is only present in males and is intended to sexually attract females.

6 0

3 years ago

What is the purpose of chromosomes in the nucleus?

attashe74 [19]

They are made of protein and one molecule of deoxyribonucleic acid (DNA). As the genetic material passes from parents to child, the chromosomes are responsible for containing the instructions that make the offspring unique while still carrying traits from the parent.

6 0

3 years ago

Read 2 more answers

Which population factor would INCREASE the population of deer in a given area?

Nastasia [14]

Answer:

Less predators

Explanation:

5 0

2 years ago

A protein biochemist attempted to determine the amino acid sequence of a decapeptide. Use the results from the trypsin, chymotry

Maksim231197 [3]

Answer:

The possible sequence of the decapeptide is Met-Val-Lys-Tyr-Thr-Trp-Ala-Arg-Pro-Phe.

Explanation:

The cyanogen bromide cleaves the carboxyl end of Met (methionine and non-peptide). Trypsin cleaves on the C-terminal of Arg and Lys, however, not on the N-terminal of Pro, which signifies that Lys is the last amino acid in T2. Hence, Met-Val-Lys----. The middle part of the sequence can be predicted from the digestion done by chymotrypsin.

The chymotrypsin cleaves on the C terminal of Phe, Trp, Tyr, however, not on the N side of Pro. CT3 exhibit Lys, Met, Tyr, Val, as Met-Val and Tyr are the initial three amino acids, therefore, Tyr must be the fourth one. Now the sequence will be Met-Val-Lys-Tyr...

CT1 possesses Ala, Arg, Phe, Pro, as chymotrypsin cleaves the C side of the Phe, thus, the last amino acid should be Phe. Also, CT1 has Ala as the first amino acid. Also, trypsin does not cleave on the N-end of Pro. Thus, the sequence of CT1 strands will be Ala-Arg-Pro-Phe.

In CT2, chymotrypsin cleaves on the C-side of trp. Thus, the sequence of CT2 strands as Thr-Trp is found in the middle. Thus, the whole sequence of the decapeptide strand will be:

Met-Val-Lys-Tyr-Thr-Trp-Ala-Arg-Pro-Phe.

3 0

3 years ago