Which are two sources of genetic variations?

• gene shuffling, mutations

• gene shuffling, niche

• founders effect, mutations

• founders effect, speciation

Natural selection acts directly on -

• alleles.

• genes.

• phenotypes.

• mutations.

Which isolation keeps the Wood frog and the bullfrog from mating if they’re in the same habitat?

• Temporal Isolation

• Behavioral Isolation

• Convergent Isolation

• Geographic Isolation

The separation of populations by barriers such as rivers, mountains, or bodies of water is called -

• temporal isolation.

• behavioral isolation.

• geographic isolation.

• genetic equilibrium.

The species of finches that Charles Darwin found on the Galapagos Islands displayed different structural adaptations. One of the adaptations that Darwin noted was the -

• similarities of the birds’ embryos.

• birds’ different-shaped beaks.

• length of the birds’ necks.

• number of eggs in each bird’s nest.

Which is the best hypothesis based on the following question:

Does the distance between bird nests affect the interaction of the birds?

• yes

• The distance between bird nests has an effect on the interaction of the birds.

• If the distance between bird nests is increased, then the interaction of the birds will decrease.

• If the interaction of the birds is decreased, then the distance between bird nests will increase.

What can be described as the "ecological role of an organism in a community"?

• niche

• home

• job

• naces

The first birds that flew to the Galapagos from South America are known as the -

• foundational species.

• variation species.

• pioneer species.

• geographic species.

The formation of a new species is called

• Natural selection

• Struggle for existence

• Speciation

• Darwinism

The flowers of pink tulips open in the morning, while the flowers of lavender tulips open in the early afternoon. The bees that pollinate these tulips cannot carry pollen back & forth between the two types of tulips because of their flowers being closed at different times of day. What type of reproductive barrier is this?

• behavioral isolation
• hybrid sterility 
• temporal isolation
• mechanical isolation