Which biome is rapidly expanding into the African Sahel?
A) Tropical deciduous forest
B) Savanna
C) Chaparral
D) Desert
E) Tropical rain forest
D
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To avoid confusion and facilitate ease of data interpretation, researchers working on cloned DNA from the same species use
A. restriction fragment length polymorphisms. B. shotgun sequencing. C. sequenced-tagged sites. D. clone by clone sequencing. E. consensus sequencing.
If the duration of life on Earth was on a comparative scale of 20,000 days, for how many of those days would the human species be present?
A. 1 B. 100 C. 2000 D. 10,000 E. 20,000
The extremely flexible tissue that provides support in soft, nonwoody plants, allowing them to grow
upward, is: a. parenchyma tissue. b. collenchyma tissue. c. sclerenchyma tissue. d. dermal tissue. e. meristematic tissue.
A researcher decides to repeat an experiment and reassess results first established in the 1930's about why plants grow toward light. Which of the following is the best reason for conduction this experiment?
a) plant behavior could have modified due to evolutionary processes since the experiments were first done b) new breeds of plants discovered since the 1930's have not yet been shown to have to same light responses c) shifts in average temperatures produced by global warming may affect plants in ways that are not yet understood d) equipment and methods developed since the 1930's may produce better data and provide mechanistic detail.