According to most paleoanthropologists, which of the following is true?
a. When modern humans arose, archaic humans disappeared worldwide.
b. Modern humans and archaic humans survived side-by-side for millions of years in Africa.
c. When modern humans arose, archaic humans disappeared in Africa.
d. Modern humans and archaic humans survived side-by-side for thousands of years in Africa.
Ans: c. When modern humans arose, archaic humans disappeared in Africa.
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Tris-BP was banned after the discovery that the chemical caused cancer in test animals and was ____________________ through the ____________________ by those wearing treated clothing
Fill in the blank(s) with correct word
Human activities are responsible for an increase in the amount of atmospheric carbon dioxide. Many feel that the buildup of this gas is at least partly responsible for the greenhouse effect and global warming. Increased carbon dioxide may actually be a benefit to some plants since they need carbon dioxide for carbon-fixation. How will the greenhouse effect influence the biosphere? Even though
experiments have shown increased carbon dioxide to be a boon for test plants, some scientists are still concerned about this phenomenon. Why? What will be an ideal response?
The part of the brain that directly controls secretions from the pituitary gland is the ___________
Fill in the blank(s) with the appropriate word(s)
Which of the following is NOT a product of cellular respiration?
Carbon dioxide Energy (ATP) Oxygen Water