Pathogenic microorganisms and their hosts live in a close association with one another known as:
A. sociality
B. commensalism
C. biofilms
D. parasitism
E. mutualism
Answer: D
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The movement of materials already in the phloem can be described using the term(s):
a. source-to-sink only b. pressure flow only c. cohesion only d. both active transport and cohesion e. both source-to-sink and pressure flow
Carbon dioxide in the atmosphere ____
a. is destroying the ozone layer b. has dramatically increased in the last few decades c. is one of the prime reasons for acid depositions d. is a waste gas produced by respiration and has no biological use e. can change spontaneously to carbon monoxide in sunlight
Diploid organisms
a. have corresponding alleles on homologous chromosomes. b. are usually the result of the fusion of two haploid gametes. c. have two sets of chromosomes. d. have pairs of homologous chromosomes. e. have all of these qualities.
Which instrument would be used to examine living cells that are attached to other surfaces, such as artery plaques?
a. Phase-contrast microscope b. Scanning acoustic microscope c. Fluorescence microscope d. Confocal microscope