Blood pressure ________ with distance from the left ventricle, while the total cross-sectional area of the blood vessels ________.
A. stays the same; increases
B. increases; decreases
C. decreases; increases
D. decreases; stays the same
E. stays the same; decreases
Answer: C
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When a forest fire destroys a habitat, but secondary succession allows the forest to be rebuilt, the new forest will continue to be modified over the years until equilibrium is reached and what has formed?
a. population b. primary community c. climax community d. ecosystem
The binding of a plant hormone to its receptor
typically induces
a. an increase in membrane permeability. b. an enzyme-substrate cascade. c. an inhibition of protein synthesis. d. a change in gene expression. e. increased DNA replication activity
Mitochondria and chloroplasts are the other organelles besides the nucleus that contain:
A. DNA. B. pigments. C. plasma membranes. D. channels. E. pores.
In Mendel's pea plants, yellow seeds are dominant to green seeds. Purple flowers are dominant to white flowers. Use Y and y for the seed color alleles and P and p for the flower color alleles. Flower color and seed color assort independently. If a plant
that is heterozygous for both flower color and seed color genes is self-fertilized, what proportion of the offspring will have one of the dominant phenotypes, either the seed color or flower color, but not both? A) 9/16 B) 9/32 C) 6/64 D) 6/16 E) 6/32