Which of the following explains how fossils in South America and Africa are similar?
a. fossilization
b. fossilization dating
c. plate kinetics
d. plate tectonics
e. radiometric dating
ANSWER: d
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The cytoskeleton of plant cells includes:
A. microtubules, microfilaments, and intermediate filaments. B. actin, microfilaments, and intermediate filaments. C. actin, microtubules, intermediate filaments. D. tubulin, microfilaments, and intermediate filaments. E. microtubules and microfilaments.
Humans cannot survive long at altitudes greater than 6000 m because ________.
A. the partial pressure of O2 becomes less than half that at sea level B. there is much more CO2 in the atmosphere at the higher altitudes than at sea level C. the diaphragm cannot be contracted enough to produce a full breath D. alveoli become compressed at the lower atmospheric pressures
For this problem, you may want to create a
Punnett Square on a separate piece of paper. Manuel has both cystic fibrosis, a recessive disorder, and sickle cell anemia which is also a recessive disorder. Manuel’s partner, Lucretia, is normal for both conditions. What is the probability that Manuel and Lucretia will have a normal child without either of the conditions Manuel has?
a. 0% b. 25% c. 75% d. 100% e. it is not possible to solve this problem with the information provided
The height at which green anoles and brown anoles perch in trees overlaps a bit. When brown anoles were introduced to islands inhabited by green anoles, the green anoles evolved a higher number of specialized toe scales in order to perch higher than they previously did when they were the sole species on the island. This is an example of:
A. Interference competition B. Ecological character displacement C. Ecological release D. Escape-and-radiate coevolution