Question

1.For natural selection to occur, variation must exist. This is true because without variation

Group of answer choices

there is no way for change to occur between generations.

traits are never inherited by offspring.

there is no competition among individuals.

the one trait that exists is always advantageous, and change is not necessary.

2.Even though natural selection was named after the artificial selection that plant and animal breeders use, it really refers to the

Group of answer choices

variable ability of species to survive and reproduce.

reproduction of traits from generation to generation.

selective retention of variation in a population.

survival of the physically fit.

3.

Darwin believed that when a new species arises, it does so by

Group of answer choices

gradually accumulating small changes.

immediately achieving a distinct, discontinuous form.

following God’s will.

achieving perfection through natural selection in the first try.

4.

What does Mendel’s second principle (of independent assortment) state?

Group of answer choices

Transmission includes both blending and particulate inheritance.

Eggs and sperm are formed independently of one another.

The inheritance of one trait does not affect the inheritance of another trait.

Particles inherited from the mother are more likely to be transmitted to female offspring, and particles inherited from the father are more likely to be transmitted to male offspring.

5.

An organism expresses antipredator tactics regardless of the number of predators in the environment. This is an example of

Group of answer choices

behavioral plasticity.

behavioral mimicry.

behavioral canalization.

behavioral localization.

Answer 1

Q1)

there is no way for change to occur between generations.

In the absence of variation, each successive generation would be identical to its parents and therefoe natural selection cannot select for fitter individuals.

Q2)

variable ability of species to survive and reproduce.

Natural selection is a process that filters populations and species on their ability to survive the environment they are in and their ability to transmit the favorably adaptive traits to their offspring.

Q3)

gradually accumulating small changes.

Gradual change with inheritance is a key feature of Darwinian speciation, where small changes acumulate between species that prevents species from breeding.

Q4)

The inheritance of one trait does not affect the inheritance of another trait.

Independent assortment is the idea that genes specifying for two distinct traits would be passed on to the offspring generation without any 'linkage' and the inheritance pattern of one gene has no effect on the inheritance pattern of another gene.

Q5)

behavioral canalization

Canalization refers to the ability of an organism to provide the same respose regardless of the environment.