Bubble nets for confusing and trapping plankton are produced by:
a. gray whales.
b. humpback whales.
c. minke whales.
d. sperm whales.
e. dolphins.
B
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Explain the roles of the hormones GnRH, FSH, and LH in the male and female reproductive systems
What will be an ideal response?
Rabbits were introduced to Australia in the 18th century. There were no other rabbits in Australia and there were no
natural predators for the rabbits. It is likely that their population experienced ____.
a. per capita birth rate b. logistic growth c. exponential growth d. sudden death e. density independence
In humans, the allantois:a
stores embryonic nitrogenous wastes. b. eliminates nitrogenous wastes from the embryo. c. contributes to the formation of the blood vessels in the umbilical cord. d. secretes amniotic fluid. e. serves as a temporary center for formation of blood cells
Scientists study microorganisms on Earth today to search for life forms elsewhere, as well as to explore the origins of life on Earth. These microorganisms that are studied are referred to as ________.
A. extirpated B. extant C. existing D. extinct