A bacterial genus that has waxy mycolic acid in the cell walls is
A) Mycoplasma
B) Corynebacterium
C) Mycobacterium
D) Streptococcus
E) Salmonella
C) Mycobacterium
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Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that _____
A) arthropods evolved before vertebrates did B) extant terrestrial arthropods are better adapted to terrestrial life than are extant terrestrial vertebrates C) ancestral arthropods must have been poorly adapted to aquatic life, and thus experienced a selective pressure to invade land D) vertebrates evolved from arthropods E) arthropods have had more time to coevolve with land plants than have vertebrates
Regulates movement of mineral ions into root xylem.
Choose the letter of the best match: A. abscisic acid B. trichomes C. aquaporin D. endodermis E. stoma
An animal's capacity to conserve water and to
concentrate solutes for excretion in the urine is greater in a kidney with longer a. Bowman's capsules b. loops of Henle c. proximal tubules d. ureters e. afferent arterioles
How long does it take for the daughter cells from one round of replication to replicate themselves?
a. 20 minutes b. No time is required -- they are ready to divide immediately after DNA replication and separation of the daughter cells is complete if conditions are right. c. After the cells have matured fully. d. No time is needed -- the daughter cells cannot replicate further.