Four of the five choices listed below are members
of the same group. Select the exception.
a. archaeans
b. amoebozoans
c. diatoms
d. dinoflagellates
e. euglenoids
Answer: a
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Most plant viruses have genomes made of:
A. single-stranded DNA. B. double-stranded DNA. C. proteins. D. single-stranded RNA. E. double-stranded RNA.
Most of the oxygen in the blood is transported by
a. plasma. b. megakaryocytes. c. platelets. d. hemoglobin. e. leukocytes.
Which statement concerning biological clocks is false?
A) Innate circadian rhythms are generally about 24 hours in length. B) Circadian rhythms occur with or without external stimuli. C) Biological clocks are strongly influenced by external temperatures. D) Movement of plants long distances very quickly induces a kind of plant "jet lag."
You are excited because you just purchased a male guppy that has red, blue and green colors on its fins and tail. Your guppies at home do not have this combination of colors. You place the new male in with three females for mating purposes. After three weeks you have many new baby guppies and with the new color combination. This is an example of which type of selection?
A. Convergent B. Natural C. Environmental D. Artificial E. Analogous