Humans evolved from chimpanzee's roughly 7 million years ago.
a. true
b. false
Answer: b. false
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The special structure in which some actinomycetes form their spores is called a ________.
A. conidium B. basidium C. sporatorium D. sporangium
What happens when the ventricular blood pressure rises during ventricular contraction?
a. Aortic and pulmonary valves open. b. Atrioventricular valves open. c. The atria fill with blood. d. Aortic and pulmonary valves close. e. The ventricle passively fills with blood.
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.
RNA is believed to have preceded DNA because _____.
A. DNA contains thymine and RNA does not. B. DNA is double stranded and requires more components. C. DNA can store more protein-building instructions in less space. D. RNA can also function as an enzyme. E. RNA cannot replicate itself.