When the immune systems no longer distinguishes between self and nonself, _____ can result
a. autoimmunity
b. anaphylaxis
c. viral infections
d. minor allergic reactions
e. enhanced immune response
a
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Which of the following contributes to the apparent contradiction that the size of an organism's genome is not directly related to the complexity of the organism? (Choose all that apply)
A. having more than two copies of each chromosome B. a change in the amount of highly repetitive DNA sequences C. a change in the amount of moderately repetitive DNA sequences D. varying susceptibility to viral infection
Chloroplasts kept in the dark can continue to make sugar if provided with ____
a. NADPH, ATP, and CO2 b. NADPH and ATP c. CO2 and ATP d. NADPH, CO2, and ADP e. water and ATP
Which of the following is a fossil?
a. An insect encased in 10-million-year-old tree sap b. A woolly mammoth frozen in Arctic permafrost for the last 50,000 years c. Mineral-hardened remains of a whale-like animal found in an Egyptian desert d. An impression of a plant leaf in a rock e. All of these could be considered fossils
Select the best choice for statements 84–88 using the five
groups listed below. a. apicomplexans b. amoebozoans c. euglenoids d. dinoflagellates e. trypanosomes D 84. All members of this group are parasitic alveolates. M 85. These possess an eyespot for detecting light needed for photosynthesis. D 86. These move by means of pseudopods. M 87. Neurotoxin from some members of this group can kill humans. M 88. Chagas disease and African sleeping sickness are caused by members of this group.