The organisms that occupy the first trophic level near
hydrothermal vents are
a. detritivores.
b. chemosynthetic bacteria.
c. decomposers.
d. photosynthetic bacteria.
e. chemotrophic heterotrophs.
Answer: b
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Prions cause damage to the brain called
a. Alzheimer’s. b. neuronal desensitization. c. spongiform encephalopathy. d. feral neuron disjunction. e. none of these.
Irrigating land can lead to a buildup of salt in the soil called ________
Fill in the blank(s) with correct word
How many generations does it take to develop a new plant species by polyploidy?
A) 1 B) 2 C) 10 D) 20
Changes in DNA sequence from one generation to the next may result in offspring that are altered in fitness compared with their parents. The process of change and selection over the course of many generations is the basis of __________
(a) mutation. (b) evolution. (c) heredity. (d) reproduction.