The answer is a simple radial nervous system.
Echinoderms do not have brains. Around their mouth, they have central rings from which nerves radially run into arms and along the body. Movement is controlled by the branches of those radial nerves.
Answer:
A
Explanation:
Please give me Brainliest my friend
A plastic bag so that it can be cleanly put in
Answer:
There are 2 alleles, a recessive allele and a dominant allele. The weaker allele is the recessive allele.
The phase contrast microscope uses out-of-phase and in-phase light rays that produce contrast areas allowing scientists to detect even a minute number of protein molecules and focus on the minute internal structures of a particle.
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