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Recent questions in Evolutionary biology
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anandamayi
over 5 years ago
Evolutionary biology
Sympatric speciation is _____.
- A. The appearance of a new species in the same area as the parent population
- B The process by which most animal species have evolved
- C. Initiated by the appearance of a geographic barrier
- D. The emergence of many species from a single ancestor
- E. Especially important in the evolution of island species
4
fredk
over 5 years ago
Evolutionary biology
Sympatric speciation specifically excludes ______.
- a. Mechanical isolation
- b. Temporal isolation
- c. Geographic isolation
- d. Postzygotic barriers
- e. Behavioral isolation
4
lalitdiya
over 5 years ago
Evolutionary biology
The ______ is most commonly found in nature.
- A) Recessive trait
- B) Wild-type trait
- C) Parental
- D) Dominant trait
5
mubashar
over 5 years ago
Evolutionary biology
Speciation requires ______.
- A. Genetic isolation
- B. Geographic isolation
- C. Periods of rapid evolutionary change
- D. Long periods of time
- E. A mass extinction so that new environmental opportunities will be available to the survivors
4
bhera
over 5 years ago
Evolutionary biology
Molecular clocks are based on the idea that _____.
- A. Directional selection occurs at a constant rate
- B. Molecules resonate at a certain frequency that can be measured
- C. On average neutral mutations arise at a constant rate
- D. Mutations occur once every generation
- E. Advantageous mutations arise at a constant rate
4
maalolan
over 5 years ago
Evolutionary biology
Natural selection can be defined as ______.
- A. The evolution of a population of organisms
- B. A process in which changes in gene frequencies result from evolution
- C. The production of more offspring than can survive in a given environment
- D. A process in which organisms with certain inherited traits are more likely to survive and reproduce than individuals with other traits
4
hrithik
over 5 years ago
Evolutionary biology
Gene flow is accomplished by ______.
- A. Natural selection
- B. Sexual recombination
- C. Migration
- D. Mutation
4
parvini
over 5 years ago
Evolutionary biology
Genetic drift is a process based on _____.
- a. Differential reproductive success correlated to the relationship between a phenotype and the environment
- b. Immigration
- c. Mutation
- d. Emigration
- e. The role of chance
4
sekariapuram_16star
over 5 years ago
Evolutionary biology
_____ are the oldest known primate group.
- a. Apes
- b. Prosimians
- c. Anthropoids
- d. Hominids
- e. Monkeys
4
anagha
over 5 years ago
Evolutionary biology
Homology is evidence of ______.
- A. Convergent evolution
- B. Punctuated evolution
- C. Common ancestry
- D. Paedomorphosis
4
sasthi
over 5 years ago
Evolutionary biology
Jaws evolved _____.
- A. By modification of the skeletal rods that previously supported the anterior pharyngeal gill slits
- B. From the bony armor of ostracoderms
- C. From the rasping tongue
- D. By modification of middle ear bones
- E. From arthropod jaws
5
bhera
over 5 years ago
Evolutionary biology
Molecular clocks are based on the idea that _____.
- A. Directional selection occurs at a constant rate
- B. Molecules resonate at a certain frequency that can be measured
- C. On average neutral mutations arise at a constant rate
- D. Mutations occur once every generation
- E. Advantageous mutations arise at a constant rate
4
Evolutionary biology