Plant cells often have a large membrane-bound sac that is used for storing water and other substances called a:
A. central vacuole.
B. Golgi body.
C. centriole.
D. chloroplast.
E. nucleus.
A
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Found mostly in freshwater, members of this Lophotrochozoan phylum have a wheel-like, ciliated
food-gathering organ around their head called a corona. Some members of this phylum make extensive use of parthenogenesis for reproduction.
a. Rotifera b. Mollusca c. Platyhelminthes d. Annelida e. Nemertea
A plaque is
A) a colony of bacteria growing on a plate. B) a clump of bacterial cells that contain phage within them. C) a region on a plate where bacteria that have survived phage infection are living. D) an area on a plate that has live phage-resistant bacteria. E) an area on a plate that has phage and dead bacteria.
Which is NOT true about gene mutations?
a. All are transmitted to the next generation. b. They are rare but their rates can be predicted. c. Those with beneficial effects will be favored by natural selection. d. Many reduce an individual's chance of surviving and reproducing. e. Those with neutral effects neither help nor hurt the individual.
Implantation of the blastocyst into the uterine wall is correlated with the degeneration of the corpus luteum.
Answer the following statement true (T) or false (F)