Photosynthesis and cell respiration both
A) Produce carbon dioxide
B) Occur in the chloroplasts
C) Contain electron transport chain
D) Used Oxygen
E) News CO2
Ans: C) Contain electron transport chain
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The facial features seen in the child pictured here are characteristic of what syndrome?
1.Down syndrome
2.Trisomy 13
3.fetal alcohol syndrome
4.Cri du chat
A solution that contains an excess of protons is(are)
A. hydroxide ions. B. an acid. C. a base. D. the pH.
Archaea and bacteria diverged:
a. about 3 billion years ago. b. about 100,000 millions years ago. c. about 1 billion years ago. d. about 2 billion years ago. e. about 10,000 million years ago.
Why has the immune system failed to evolve impenetrable protection against all pathogens?
a. Pathogens have population sizes that are much larger than those of their hosts. b. Pathogens have much higher mutation rates than their hosts. c. Pathogens and hosts are involved in an evolutionary arms race. d. Pathogens and hosts are coevolving.