Which factor is the most important algal
contribution to the fungal component of a
lichen?
a. improved water conservation
b. mechanical protection
c. photosynthetically derived food
d. conversion of nitrogen gas to nitrates
e. pigment for camouflage
C
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Which of the following is a RNA molecule?
A. XIST B. Barr Body C. CTCF D. HRE
You enjoy a lot of salt on your food. One of the long-term effects will be an increase in blood volume
The increase in blood volume will eventually result in all of the following except:a. an increase in cardiac output. b. an increase in blood pressure. c. an increase in stroke volume. d. an increase in the force of contraction of the heart. e. an increase in body temperature.
Which is a characteristic of tapeworms?
a. Tapeworms have a simple life cycle. b. Tapeworms have a complete digestive system. c. Tapeworms have a closed circulatory system. d. Tapeworms have a well developed sensory system. e. Tapeworms have bodies that consist of hundreds of reproductive segments.
The work of scientists usually begins with
A) drawing conclusions. B) careful observations. C) testing a hypothesis. D) creating experiments.