BSCS- CH 2

Which of the following examples/descriptions would match Darwin's thinking?

• natural selection

• acquired characteristics

• As horses walked over the rough ground, their feet became tougher and tougher until the toes fused together to form a hoof. This acquired trait was then passed on to subsequent generations.

• Some horses were born with larger middle toes, and this made it easier for those horses to walk over uneven ground. The horses with larger and tougher middle toes were able to outcompete those horses without this trait, and so they reproduced more. Eventually, this led to the development of a hoof.

• The widespread use of DDT in the mid-1900s put pressure on insect populations to become resistant to DDT. As a result, large populations of insects today are resistant to DDT.

Continents move because of convection currents in the mantle. This statement is a ___.

• theory

• law

• hypothesis

If you refrigerate apples, they will last longer before going bad. This statement is a ___.

• theory

• law

• hypothesis

Other galaxies velocity, in relation to our own, is quantified as velocity= Hubble constant × distance. This statement is a ___.

• theory

• law

• hypothesis

Planets orbit the sun elliptically. This statement is a ___.

• theory

• law

• hypothesis

Populations of organisms change over time. This statement is a ___.

• theory

• law

• hypothesis

Natural Selection explains how populations of organisms change over time. This statement is a ___.

• theory

• law

• hypothesis

An example of a physical adaptation is.

• webbed feet on a duck

• brown eyes on a pig

• 4 legs on an elephant

• a stem on a plant

Which of the following describes a population?

• dogs and cats living in Austin, Texas

• four species of fish living in a pond

• oak trees in Middletown, Connecticut

• roses and tulips in a garden

Which of the following is an inference with respect to Lucy?

• Lucy was bipedal.
• Lucy’s pelvis and the pelvis of modern humans are similar.
• Lucy’s knee bones and the knee bones of modern humans are similar.
• Lucy’s skeleton was incomplete.