In plants and algae, __________ is the source of the electrons needed for photosynthesis
A. O2
B. CO2
C. H2O
D. NADPH
E. H+
C
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Cetaceans lack sweat glands in their skin
Indicate whether the statement is true or false
Because of age estimates of the Tiktaalik fossil species, at approximately 380 mya, it lived
A. in the Devonian era, before dinosaurs and mammals appeared. B. None of the answer choices is correct. C. during the Precambrian, when only primitive species were found in the fossil record. D. in the Mesozoic era, with early dinosaurs, mammals, and conifer trees. E. in the Cenozoic era after dinosaurs.
AIDS stands for ____
a. Acquired Immune Deficiency Syndrome b. Accelerated Immune Death Syndrome c. Accentuated Induced Deficiency Syndrome d. Advantageous Immunity Deficiency Syndrome e. Acquired Immuno Defense Syndrome
Why is a woman more likely to experience bladder infections than a man?
A) The urethra and vagina are separate openings into the body. B) The urethra is shorter in a woman than in a man. C) The urethra is longer in a woman than in a man. D) The acidity of the urine makes women more susceptible to infections.