Which of the following statements about the relationship between humans and evolution is FALSE?
a) Like all living things, humans are still evolving.
b) Because evolutionary processes are operating today just as they have been since life first appeared on Earth, humans have not influenced evolutionary processes.
c) Preferential sport hunting can change the phenotypic distribution of traits in the hunted population.
d) Humans have modified organisms using biotechnology.
e) Humans' ability to control pest populations makes us powerful agents of evolutionary change.
Ans: b) Because evolutionary processes are operating today just as they have been since life first appeared on Earth, humans have not influenced evolutionary processes.
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During which stage of meiosis will the pairs of homologous chromosomes line up?
A) metaphase I B) metaphase II C) metaphase D) anaphase I E) prophase II.
What is the current rate of species extinction?
a. 500xs faster than normal b. 20xs faster than normal c. 100xs faster than normal d. 10xs faster than normal e. 1000xs faster than normal
Which scenario would be a modern example of Lamarckianism?
a. A strain of houseflies resistant to insecticides emerges. b. Squirrels separated by a river are found to be unable to interbreed. c. A son is born with a portion of his right index finger missing--the same portion that was severed from his father's hand in an accident. d. A species of lizards shows changes in diet and body shape after being moved to a nearby island. e. Snails are found to have thicker shells after the introduction of a predator.
An Acacia seedling grown in shade (50% full sun) is expected to have a ________ net assimilation rate (NAR) and a ________ leaf area ratio (LAR) than an Acacia seedling grown in full sun
A) higher; higher B) lower; lower C) lower; higher D) higher; lower