Answer the following statements true (T) or false (F)
1. The chance that a mutation will occur is independent of whether a new phenotype will benefit a population.
2. The hypothesis that birds are closely related to small dinosaurs called theropods began with the discovery of the fossilized skeleton of Archeopteryx.
3. Dinosaurs appeared, became diverse, and eventually became extinct during the Paleozoic era.
4. Earth's history spans about 4.5 billion years.
5. The abundant presence of ammonite fossils, corals, sponges, and crinoids in a large area indicates that the area was once part of an ocean.
1.TRUE
2.TRUE
3.FALSE
4.TRUE
5.TRUE
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What structures will attach your chromosomes to the spindle fibers?
a. Cleavage furrows b. Contractile ring c. Centrioles d. Actin filaments e. Microtubules
What type of sugar is shown in the figure above?
a. deoxyribose b. ribose c. phosphate d. nitrogenous e. adenine
Organisms that demonstrate type I
survivorship are characterized by a. high r, small offspring. b. low r, small offspring. c. low r, large offspring. d. high r, large offspring. e. low r, large population size
People living in the northeastern United States are more at risk for exposure to which of the following rickettsias?
A) Rickettsia rickettsii B) Rickettsia typhi C) Ehrlichia chaffeensis D) Orientia tsutsugamushi E) Rickettsia prowazekii