Australopithecis anamensisis a good direct ancestor for Australopithecus afarensis
a. true
b. false
Answer: a. true
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Which of the following is a difference between electronegative and electropositive atoms?
A. Electronegative atoms tend to lose electrons. B. Electropositive atoms tend to gain electrons. C. Because oxygen (O) is strongly electropositive it will have a partial positive charge in H2O. D. Because hydrogen (H) is strongly electronegative it will have a partial negative charge in H2O. E. As atomic radii decrease, atoms tend to become more electronegative.
Tobacco mosaic virus can be transmitted between individual plants by biting insects.
Answer the following statement true (T) or false (F)
A serous membrane lines a body cavity that opens to the outside of the body
____________________ Indicate whether the statement is true or false.
In a set of classic experiments performed in the early 1950s, Urey and Miller subjected an experimental system composed of H2, CH4 (methane), and NH4 (ammonia) to electrical sparks. A few days later, they found ________________ in their system.
a. cells b. rRNA c. DNA d. tRNA e. amino acids