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AVprozaik [17]
4 years ago
11

what are structures without a present-day function called? a. homologous c. vestigial b. analogous d. extinct

Biology
1 answer:
Lesechka [4]4 years ago
4 0
C. Vestigial. 

A vestigial structure example in out bodies is the Appendix. We don't really need it, it just kind of "hangs out" in our bodies. We evolved to not need it. 

I hope this helped! Let me know if it did not! 
I hope you have a fantastical day!!!XD
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he principal role for simple sugars in living organisms is to . multiple choice form cell membranes serve as a form of long-term
maks197457 [2]

The principal role of simple sugars (i.e. simple carbohydrates) in living organisms is to create cellular energy.

<h3>What are simple carbohydrates?</h3>

Simple carbohydrates (e.g. glucose, fructose) are a special class of macromolecules composed of only one monosaccharide unit, which serve as a source of energy for cellular respiration.

In conclusion, the principal role of simple sugars (i.e. simple carbohydrates) in living organisms is to create cellular energy.

Learn more about simple carbohydrates here:

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7 0
2 years ago
Which of the following elements is required for growth and development and is in our DNA? *
Readme [11.4K]

Answer:

Nitrogen

Explanation:

Nitrogen is the most abundant element in our atmosphere and 7th most abundant in the universe.  It is vital in the formation of nitrogenous bases which are the key bonds that form nucleic acids such RNA and DNA.

4 0
3 years ago
What does having multiple alleles mean? Give an example of a human multiple allele traits.
bagirrra123 [75]

Alleles are versions of a gene that will express different qualities.  Multiple alleles would mean that a gene has many variations; for example, there a multiple alleles for eye color: blue, green, brown, etc.  The opposite would be a gene with just two variations; an example would be simple pea plants which can have smooth or wrinkled pods.

Hope this helps!!

4 0
3 years ago
One method for separating polypeptides utilizes their different solubilities. The solubility of large polypeptides in water depe
Otrada [13]

Answer:

Polypeptides are composed of amino acids, and we know amino acids are differently charged, have different R groups, and also have different isoelectric points. Depending on different isoelectric points and charged groups, the polypeptides can be separated and because a protein has its lowest solubility on its isoelectric point.

So in this question,

(a) (Lys-Ala)3 ; this is highly positively charged (polar) at pH 7 than (Gly)20 which is uncharged except for the amino and carboxyl terminal.

(b) (Glu)20 ; it is highly negatively charged at pH 7 whereas (Phe-Met)3 is much less polar and hence less soluble.

(c) (Asn-Ser-His)5 ; at pH 3, because in (Ala-Asp-Gly)5 the carboxylate groups of Asp residues are partially protonated and neutral, whereas in (Asn-Ser-His)5 , the imidazole groups of His residues are fully protonated and positively charged.

(d) (Asn-Ser-His)5; at pH 6.0; both polymers have polar Ser sidechains, but (Asn-Ser-His)5 also has the polar Asn side chains and partially protonated His side chains.

Explanation:

3 0
3 years ago
What is the role of cyclins in a cell?​
svetoff [14.1K]

Answer:

Control of cell transition from one phase of the cell cycle to another

Explanation:

Control of cell transition from one phase of the cell cycle to another is not the only role of cyclin in the cell.

The role of cyclin C and H in the processes of transcription regulation is shown.

Cyclin H, together with the transcription factor TFIIH, plays a role in the phosphorylation of the CTD-tail of RNA polymerase II during the transcription process.

Cyclin L participates in the processes of primary transcript processing.

7 0
3 years ago
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