Which one of the following applies to the phylum Ctenophora?
A. often bioluminescent marine animals
B. protostome
C. coelomate
D. deuterostome
E. Parazoa
A. often bioluminescent marine animals
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Which of the following statements describe a reason ribosomal genes are useful for comparing evolutionary relationships among organisms?
A. There are many differences in these genes, even among closely related species. B. All organisms possess these genes and they can be compared with each other. C. These are the only genes that have been sequenced for every organism on Earth. D. Ribosomes of prokaryotes and eukaryotes are identical. E. It is possible to compare the large subunit genes with the small subunit genes.
A structure, such as a flower in plants, or a liver in animals, consisting of tissues organized to carry out a specific function is a(n)
A. molecule. B. cell. C. organ. D. population. E. organelle.
Shortly after fertilization, successive cell
divisions convert the zygote into a multicellular embryo during a process known as
a. meiosis. b. parthenogenesis. c. gastrulation. d. cleavage. e. blastulation
The components of the pectoral girdle are:a
three fused hipbones. b. the clavicles and the scapula. c. the ribs and the clavicles. d. the ribs and the sternum. e. the ribs and the digits.