What is the ultimate source of genetic variation within a population?
a. Mutations in DNA
b. Adaptation of a species to environmental changes
c. A sensory system that can detect an environmental change
d. Homeostatic mechanisms that compensate for environmental changes
e. A system of locomotion that allows an organism to escape environmental changes
a
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Ribosomes are in the cells of
A) eukaryotes only. B) animals only. C) vertebrates only. D) all organisms.
Under dry conditions, a C4 plant is more efficient at photosynthesis than that of a C3 plant
Indicate whether the statement is true or false
Which invention led to trans fats being marketed as a solid cooking fat?
a. the electric light b. the telephone c. the automobile d. the microwave oven e. the refrigerator
_____________ is the ability to distinguish two points as separate points.
Fill in the blank(s) with the appropriate word(s).