Archaeal membranes contain which of the following lipids?
A. Glycolipids
B. Sulfolipids
C. Phospholipids
D. All of the choices are correct.
Answer: D
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List the genotypic ratios of the cross between a man with O blood type and a woman with heterozygous B blood type.
What will be an ideal response?
The energy parasite Chlamydia is known to:
a. eradicate males from a population. b. convert males into females. c. cause infected females to lay eggs that develop without fertilization. d. reduce the number of males in a population. e. lack peptidoglycan in cell wall
Woolly Spider Monkeys are Old World Monkeys found in Africa that exhibit ancestral features.
Indicate whether the statement is true or false.
If a fossil is encased in a stratum of sedimentary rock without any strata of volcanic rock (for example, lava or ash) nearby, then it should be _____
A) easy to determine the absolute age of the fossil, because the radioisotopes in the sediments will not have been "reset" by the heat of the igneous rocks B) easy to determine the absolute age of the fossil, because the igneous rocks will not have physically obstructed the deposition of sediment of a single age next to the fossil C) difficult to determine the absolute age of the fossil, because the "marker fossils" common to igneous rock will be absent D) difficult to determine the absolute age of the fossil, because radiometric dating of sedimentary rock is less accurate than that of igneous rock