DDT is a(n)
a. blight that affects American chestnut trees.
b. endangered plant species.
c. pesticide.
d. wildlife refuge area in Yellowstone National Park.
C
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A circular molecule of DNA devoid of any histone proteins describes the chromosome of a (an):
A. protozoa B. yeasts C. insects D. flowering plants E. bacteria
Color blindness is a recessive X-linked trait. A normal couple has a color-blind child. Who else in this family is probably color blind?
A. the child's maternal grandfather B. the child's maternal grandmother C. the child's paternal grandfather D. the child's paternal grandmother E. the child's maternal grandmother or grandfather
Squirrels in cities are accustomed to humans and will continue to forage in their presence. What term best describes this behavior?
a. learned behavior b. imprinting c. desensitization d. habituation e. habit formation
What three steps do all adaptive immune responses include?
What will be an ideal response?