As the glaciers continue to melt with increasing global temperatures, some forms of bacteria that are more than 1 million years old have begun to reanimate. Which feature of prokaryotes help them in this process:
a. endospores
b. binary fission
c. plasmids
d. conjugation
e. cytoplasmic streaming
Answer: a. endospores
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Which of the following scientists discovered penicillin?
A) Alexander Fleming B) Paul Ehrlich C) Selman Waksman D) Sir Howard Walter Florey
In flatworms and sea anemones, circulation of
solutes and gases is by way of
a. interstitial fluid diffusion. b. an open circulatory system. c. a closed circulatory system. d. cell to cell transport. e. intracellular diffusion.
A person working with plants may reduce the inhibition of apical dominance by auxin via which of the following?
a. pruning shoot tips b. deep watering of the roots c. fertilizing d. treating the plants with auxins e. feeding the plants nutrients
Salmonella (lactose NON-fermenter &hydrogen sulfide producing bacteria) growing on the Salmonella-Shigella Agar will appear as
A. Clear colonies with have black centers due to precipitation of iron salt B. Clear or amber colonies C. Blue-black colonies D. Pink or red colonies E. Blue-black colonies with green metallic sheen