What are the characteristics of angiosperms? Check all that apply.
_____ Seed production.
_____ Flower production.
_____ They do not produce fruit.
_____ They produce embryos.
__X__ Seed production.
__X__ Flower production.
_____ They do not produce fruit.
__X__ They produce embryos.
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The primary male hormone is
a. produced throughout a male's entire lifetime. b. testosterone. c. estrogen. d. only involved in sperm production. e. produced in the brain.
If, when water froze, every water molecule formed a hydrogen bond with only one additional water molecule, which of the following would not happen?
a. Many aquatic organisms would not survive cold temperatures. b. Ice would likely sink to the bottom of lakes and rivers. c. Ice would be less dense than liquid water. d. Water molecules in ice would demonstrate a disorganized, non-lattice arrangement. e. Bodies of water would appear to freeze from the bottom up.
Identify the form of nonionizing radiation from the list below:
A) gamma rays B) X rays C) cathode rays D) ultraviolet rays
The discharge of high levels of microbial nutrients into marine environments has ________.
A. resulted in algal blooms and red tides that have killed marine mammals B. resulted in the production of large hypoxic or anoxic regions C. had negative impacts on shellfish and other bottom-dwelling marine animals D. All of the choices are correct.