1. When a new species originates from individuals of a pre-existing species, we
ID: 217990 • Letter: 1
Question
1. When a new species originates from individuals of a pre-existing species, we call this process:
Select one:
a. Interbreeding
b. Heredity
c. Mutation
d. Convergence
e. Speciation
2.
Under what conditions is a new species LEAST likely to form?
Select one:
a. There is highly selective mating.
b. There is high gene flow with other populations.
c. The population is behaviorally isolated.
d. There is a high degree of genetic drift from other populations.
e. The population is geographically isolated.
3.
According to our reading, which of the following is the most critical step in the process of speciation?
Select one:
a. Loss of the ability to interbreed with the ancestral population
b. Changes in the niche or feeding behavior of an individual
c. Acquisition of an evolutionary adaptation
d. Loss of the ability to reproduce
e. Changes in the physical appearance of a species
4.
Which statement about evolution is TRUE?
Select one:
a. Only populations evolve, individual organisms do not.
b. Natural selection causes good mutations for the benefit of the species.
c. Natural selection is a random event affecting differently expressed characteristics equally.
d. The life span of an individual determines its fitness.
e. Organisms which are better and more complex are always more evolved.
5.
Which statement is TRUE regarding adaptations?
Select one:
a. Adaptations are traits that provide increased reproductive success.
b. Many adaptations are acquired in later life.
c. If a plant is exposed to dry conditions, it will evolve adaptations to find more water.
d. A fit individual will adapt to its environment.
6.
Natural selection is best defined as:
Select one:
a. The mechanism that favors certain heritable traits and allows individuals that carry them to reproduce the most.
b. Survival of the best adapted individuals in a population.
c. A difference in population growth rates.
d. Elimination of the weak by the strong.
7.
Note the pattern the pairing of nucelotide bases follow. If you were to count the nucleotide bases of intact DNA within a cell, you will find that:
Select one:
a. The amount of A and T are always exactly the same.
b. The amount of T and G are always exactly the same.
c. The relative amount of all four bases is highly variable.
d. The amount of G is approximately 10% less than C .
Explanation / Answer
Ans. 1 speciation is the process of formation of new species from existing species. So ans. (e)
Ans. 2 (a)
Ans. 3(a)
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