Which of the following statements about algae is FALSE?
A) They use light as their energy source.
B) They use CO2 as their carbon source.
C) They produce oxygen from hydrolysis of water.
D) All are unicellular.
E) Some are capable of sexual reproduction.
D
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Based on their experiment with T2 bacteriophages, Hershey and Chase concluded that
A. DNA replication is semiconservative. B. the phage coat contains the genetic material. C. DNA functions as the genetic material. D. A always pairs with T and G always pairs with C. E. virulent bacteria can transform nonvirulent bacteria.
How did Thomas Malthus's ideas, about human population, affect Darwin's ideas on natural selection?
A. Darwin decided that if human population increased with each successive generation, all animals and plants must reproduce using the same principles. B. Darwin abandoned his idea of natural selection because Malthus' work proved that populations would continually double in number with each generation. C. Thomas Malthus believed that human populations declined when temperature drops, therefore Darwin concluded that all plant species will not reproduce in cold temperatures. D. Mallthus believed that only a fraction of any population will survive and reproduce, Darwin contradicted Malthus's theories and said that all species will continue to survive and reproduce indefinitely. E. Malthus theorized that only a fraction of any human population will survive and reproduce. Darwin's observations during his voyage on the Beagle, supported Malthus' theory.
The bipedal posture of humans evolved from ____
a. deleterious mutations b. a novel mutation c. quadrupedal ancestors d. bipedal ancestors e. flightless birds
Red marrow is the major site of ________ formation
a. all of the choices b. bone c. cartilage d. blood cell