What is Genetics? Answer : A. The study of the structure and function of genes and their transmission from parents to offspring....
Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as (1) Divergent evolution (2) Adaptive radiation (3) Natural selection (4) Migration Answer : Adaptive radiation...
A mass extinction is A) the extinction of small-sized species. B) the extinction of large-sized species. C) the simultaneous extinction of many species. D) something that has never been seen in the fossil record. Answer : C) the simultaneous extinction of many species....
How common has extinction been in the fossil record? A) Over 99 percent of all past species have become extinct. B) Roughly 50 percent of all past species have become extinct. C) Roughly 25 percent of all past species have become extinct. D) Very few species have ever become extinct. Answer : A) Over 99 percent of all past species have become extinct....
According to the idea of punctuated equilibrium, macroevolution usually involves A) slow and gradual change. B) alternating periods of stasis (no change) and rapid change. C) most species becoming extinct in a relatively short time. D) species selection. Answer : B) alternating periods of stasis (no change) and rapid change....
According to the idea of gradualism, macroevolution usually involves A) slow and gradual change. B) most species becoming extinct in a relatively short time. C) alternating periods of stasis (no change) and rapid change. D) species selection. Answer : A) slow and gradual change....
In your study of the fossil record of early mammals, you notice a changing environment is followed by the initial appearance of a tree-climbing species, which is then followed by many later tree-climbing ... is an example of A) anagenesis. B) gradualism. C) species selection. D) adaptive radiation. Answer : D) adaptive radiation....
Rapid speciation following the availability of new environments is known as A) gradualism. B) adaptive radiation. C) species selection. D) punctuated equilibrium. Answer : B) adaptive radiation....
When we place fossil specimens into different species based on their physical appearance, we are using the ___________ concept. A) biological species B) paleospecies C) anagenetic species D) monospecies Answer : B) paleospecies...
_______________ acts to inhibit reproductive isolation. A) Mutation B) Natural selection C) Genetic drift D) Gene flow Answer : D) Gene flow...
________________ is when a species gives rise to a new and separate species. A) Polygenesis. B) Monogenesis. C) Cladogenesis. D) Anagenesis. Answer : C) Cladogenesis....
Someone comes up to you and states that an early species of ape could not have evolved into the first humans because both apes and humans are alive today. This person has failed to grasp the nature of A) polygenesis. B) monogenesis. C) cladogenesis. D) anagenesis. Answer : C) cladogenesis....
The origin of a new species first requires A) reduced gene flow. B) increased gene flow. C) reduced mutation rates. D) increased mutation rates. Answer : A) reduced gene flow....
A chronospecies is A) a population that will eventually become a new species, given enough time. B) a species that, though reproductively isolated, looks exactly like another species. C) a label used for ... evolving over time. D) a measure of how many new species appear in a given period of time. Answer : C) a label used for a stage of a single species evolving over time....
The transformation of a species over time is known as A) polygenesis. B) monogenesis. C) cladogenesis. D) anagenesis. Answer : D) anagenesis....
According to the biological species concept, horses and donkeys are not considered in the same species because A) they never mate. B) they do not produce fertile offspring. C) they look different. D) they do not share a relatively recent common ancestor. Answer : B) they do not produce fertile offspring....
When you flip a coin, what is the probability that it will come up tails? a. ½ b. ¼ c. 1/8 d. 1
Unlike mitosis, meiosis results in the formation of a. diploid cells. b. haploid cells. c. 2N daughter cells. d. body cells. Answer : b. haploid cells....
Gametes have a. homologous chromosomes. b. twice the number of chromosomes found in body cells. c. two sets of chromosomes. d. one allele for each gene. Answer : d. one allele for each gene....
If an organism’s diploid number is 12, its haploid number is a. 12. b. 6. c. 24. d. 3. Answer : b. 6....
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