Which of the flowering plant structures is used to attract a specific type of pollinator?
A. carpel
B. stamens
C. petals
D. sepals
Answer: C
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What type of blood vessels has the slowest velocity of blood flow?
A) arteries B) arterioles C) veins D) capillaries
Grassland expansion is associated with which of the following variables?
A. increased rainfall and decreased atmospheric CO2 B. increased rainfall and increased atmospheric CO2 C. decreased rainfall and decreased atmospheric CO2 D. decreased rainfall and increased atmospheric CO2 E. increased CO2 and increased sunlight availability
Darwin's theory of evolution is supported by many modern pieces of evidence. Check all that apply.
_____ New measurements of the age of the earth. _____ An understanding of the mechanism of heredity. _____ Human population growth. _____ Comparative studies of animal structures. _____ Similarities in DNA of related species.
A nerve consists of:
a. a grouping of dendrites. b. a mass of cell bodies. c. a network of neurons. d. a bundle of axons. e. glial cells.