Which of the following habitats is most likely to be
rich in fossils?
a. eroding hillsides
b. deserts
c. polar ice caps
d. a bed of a former shallow sea
e. rocky plateau
Answer: d
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Bacteriophage have a ________ complex structure than animal viruses, because ________
A) more / bacteriophages must be coated by lipopolysaccharide to attach to bacterial cells B) less / the bacteriophage does not have to penetrate the nucleus C) more / the bacteriophage must penetrate the peptidoglycan cell wall D) less / there prokaryotic cells have a simple structure compared to eukaryotic cells
The organism in the accompanying figure is a representative of the:a
phylum Hemichordata. b. phylum Echinodermata. c. phylum Chordata. d. subphylum Urochordata. e. subphylum Cephalochordata.
All of the following are examples of symbiotic relationships except
A. algae and fungi living together as a lichen. B. the protozoa that live in the intestine of termites and digest cellulose that termites cannot digest. C. the mosquito that visits a mammal for a blood meal. D. the malaria parasite that lives in the liver of humans.
The genome of phiX174 is ________.
A. double-stranded RNA B. single-stranded RNA C. single-stranded DNA D. double-stranded DNA