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Anettt [7]
3 years ago
10

Echinoderms _____. _____ Select one: a. have an exoskeleton of hard calcareous plates b. often use tube feet to move around in t

heir environment c. digest their food outside of the organism d. circulate hemolymph in their water vascular system e. are most often found in freshwater environments
Biology
1 answer:
atroni [7]3 years ago
4 0

Answer:

B. often use tube feet to move around in their environment

Explanation:

Tube feet are tiny tubular projections of echinoderms on the underside (oral side). They are a member of the echinoderm water vascular system.

Tubular feet are used for feeding, breathing and shifting. They are arranged around the sides, in grooves. They work by hydraulic pressure. They are used to transfer food in the centre to the oral mouth, and may stick to surfaces. Tube feet allow certain animals to stick and travel slowly to the ocean floor. for example starfish uses tube feet for the above functions.

Hence, the correct option is B.

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Whether a fly has white or red eyes is due to alleles at a single locus. It is thus a _______ or _______ trait.
maxonik [38]

Answer:

The correct answer is "qualitative, discrete".

Explanation:

A qualitative or discrete trait is defined as a characteristic that have no intermediate features, and is often the result of genetic alleles at a single locus. For instance, if the form the seeds of pea could be either round or wrinkled, but not with intermediate forms. This is the case of the fly that has white or red eyes, but does not have pink eyes or other colors in between.

8 0
3 years ago
Name a difference between a vein and artery
Yuki888 [10]
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5 0
3 years ago
Read 2 more answers
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dlinn [17]
I think the answer is B

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5 0
3 years ago
What is an embalmer?
Gnoma [55]
Hello.

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