Along with lipids, the skin of amniotes is filled with ____ to help prevent water loss
a. squalene
b. bone
c. keratin
d. collagen
e. albumin
ANSWER: c
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Small pieces of DNA synthesized on the lagging strand are called ________.
Fill in the blank(s) with the appropriate word(s).
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.
Which of the following sequences indicates the promoter region of a gene?
a. CAAT b. UAAG c. CTTT d. ACAT e. TAAC
Which of the following is the standard resource for identifying bacteria?
A) Systema Naturae B) Bergey's Manual of Determinative Bacteriology C) Woese and Fox's phylogenetic tree D) Haeckel's General Morphology of Organisms