Which of the following water uses is estimated to be the highest in human society?
A) industry B) sewage systems C) households D) agriculture
Answer: D
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Most fish deposit fertilized eggs, but some sharks keep the fertilized egg inside the female until she gives birth to a relatively well-developed pup. These sharks would thus be characterized as _____
A) live-bearing B) ovoviviparous C) oviparous D) viviparous
What term describes the time it requires for exactly one-half of a given amount of a radioactive isotope of an element to decay?
A. decay time. B. decay product. C. half-life. D. half-decay. E. useful dating range.
Malaria is caused by a parasitic dinoflagellate and is transmitted by the Anopheles mosquito
1.True 2.False
In reproductive cloning, a sperm is not used, but an egg is still required. Why?
A) Udder cells will fuse only with egg cells. B) Surrogate mother animals will develop only embryos derived from their own eggs. C) Egg chromosomes are required for embryonic development. D) Egg proteins are required for embryonic development.