What macromolecule is made from the instructions contained in a typical gene?
A) ATP
B) phospholipid
C) polysaccharide
D) protein
D
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Which of the following statements about oxygen is false?
A. Oxygen is the only potential electron acceptor available on Earth's surface. B. Only the oxidation of organic molecules by O2 provides sufficient energy to support large, active organisms. C. Oxygen concentrations in the atmosphere favor diffusion into the interior cells of organisms. D. Oxygen is necessary for complex multicellular life. E. Oxygen became abundant in the atmosphere 580-560 million years ago.
In CAM plants, such as cacti,
a. the stomata are open both day and night. b. the stomata are open during the day to let in carbon dioxide even though they cannot afford to lose the water. c. stomata are absent because water loss through them is too great. d. stomata open at night. e. guard cells are present but operate the reverse of the guard cells of non-CAM plants.
If the many offspring of a double-factor cross always have both recessive traits,
A. one parent was homozygous dominant for both traits. B. both parents were homozygous dominant for both traits. C. one parent was homozygous recessive for both traits. D. both parents were homozygous recessive for both traits.
The idea that physical changes I make to myself will be passed on to my children was proposed by
A) Lamarck. B) Darwin. C) Lyell. D) Cuvier. E) Plato.