Which of the following cell contain a nucleus?
a. bacteria
b. prokaryotes
c. eukaryotes
Ans: c. eukaryotes
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Multiple Excitatory Postsynaptic Potentials (EPSPs) from temporal summation and spatial summation can result in:
A. an action potential. B. filtering out of unimportant background signals. C. adaptation. D. hyperpolarization.
Answer the following statements true (T) or false (F)
1.Male Australian redback spiders present themselves to be eaten by their mates. 2.Consumption of male redback spiders by females keeps numbers of males in check and is an example of homeostasis. 3.Male Australian redback spiders are much larger than the females. 4.Hepatitis B can be transmitted through sexual contact. 5.Chlamydia is a sexually transmitted disease which is a major cause of female infertility.
Anthrax is a bacterium that:
A) lies dormant in a spore and is released when exposed to the optimal temperature and moisture. B) is generally not responsive to antibiotic therapy, even if the therapy is begun immediately. C) is highly communicable and would most likely be disseminated by a terrorist via a liquid medium. D) results in death more than 90% of the time, regardless of how the bacterium enters a person's body.
Which of the following is an incorrect pairing?
A. electrolytes; ions B. synthesis; endothermic C. hydrolysis; hydrogen bonds D. catabolism; exothermic E. dehydration; anabolism