In what way are a human and a crab similar?
A. Vertebrates and arthropods are deuterostomes.
B. Both have closed circulatory systems.
C. Both have muscles that pull against rigid skeletons.
D. Both have a continuous growth pattern.
Answer: C
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What best summarizes the oocyte's contribution to the zygote? a. The oocyte contributes paternal DNA
b. Numerous substances are contributed by the oocyte, including maternal DNA, enzymes, yolk, and proteins. c. Nothing; an oocyte forms after several cleavages of the zygote. d. Oocytes are the source of the enzymes used by the sperm to penetrate the egg's membrane.
The area labeled "A" is
a. a nucleus. b. chromatin. c. endoplasmic reticulum. d. a vacuole. e. a nucleolus
When glucose is in short supply, plants will quickly
hydrolyze a. glycogen. b. starch. c. cellulose. d. sucrose. e. fructose.
The genetic description of the HIV is a retro RNA Strand
a. true b. false