Sea stars, sea urchins, sand dollars, and brittle stars are all members of the same group.
what is the common name of the group to which they all belong?
1 annelids 2echinoderms 3arthropods 4cnidarians

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

Match the following items 1. rr 2. rr 3. identical alleles 4. unlike alleles 5. rr ()homozygous, recessive ()homozygous definition ()heterozygous, dominant cell ()heterozygous definition () homozygous, dominant cell