The following amoeboid protozoans are important sources of silica deposits in some areas of the world:
a. diatoms.
b. silicoflagellates.
c. radiolarians.
d. foraminiferans.
e. ciliates.
C
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A developer putting tract housing in a previously pristine area plans numerous small, open space areas where the
original habitat is to remain. As a conservationist, how would you suggest changing the plan, if at all (assume that canceling the development is not an option)? Why?
What will be an ideal response?Which structures will make up the thick filaments of a muscle fiber? a. Sarcomeres b. None of these choices
c. Myosin d. Myofibrils e. Actin
Suppose an efficient conducting system evolved in a moss that could transport water and other materials as high as a tall tree. Which of the following statements about "trees" of such a species would be FALSE?
A) Fertilization would probably be more difficult. B) Spore dispersal distances would probably increase. C) Females could produce only one archegonium. D) Individuals would probably compete more effectively for access to light.
A microaerophile
A. needs normal atmospheric levels of oxygen. B. grows best in an anaerobic jar. C. requires a small amount of oxygen but won't grow at normal atmospheric levels. D. grows with or without oxygen.