L.E. Regents June 2016

Which statement is an example of the interdependence of organisms?

• Owls hunt at night.

• Ants get food from insects and protect insects from predators.

• Ticks feed on the blood of animals and the ticks grow larger.

• Crows feed on dead mice.

Residents of a town are concerned that a recently built factory could pose health risks. Scientists were asked to investigate the effects of the factory on the health of local residents. The most relevant information they reported was that

• in a survey, residents felt that the air in town looks dirtier now

• there have been reports that other types of factories have been linked with health issues

• residents have occasionally seen smoke coming from the factory

• local medical facilities have recently reported a 15% increase in the number of patients treated for asthma

Farmers may someday clone their best milkproducing cow into a whole herd. What potential disadvantage might be important to consider in having such a large group of clones on one farm?

• It may be difficult to tell the animals apart.

• Lack of variation may limit survival in the herd.

• The cows could be fertilized by only one type of bull.

• The cows could be mated only with each other.

DNA replication occurs in preparation for

• mitosis, only

• meiosis, only

• both mitosis and meiosis

• neither mitosis nor meiosis

An individual eats a hamburger. Which two systems must interact to transfer the nutrients in the hamburger to human muscle tissue?

• respiratory and excretory

• digestive and immune

• digestive and circulatory

• circulatory and respiratory

The diagram below shows cell A completing a life process. Cell A performs functions similar to the tissues and systems in complex, multicellular organisms. This process results in

• increased genetic variation

• the maintenance of homeostasis

• a reduction in competition

• increased autotrophic nutrition

The shape of a protein molecule directly determines its

• movements through the cytoplasm

• functions inside and outside of cells

• roles in building water molecules

• circulation throughout the body

The diagram below represents a cell and some molecules in its environment. Which molecule would require the use of energy in order to be brought into the cell?

• 1

• 2

• 3

• 4

Many domestic plants that are currently used for food by humans share a wild plant ancestor. The changes that have occurred in four common plants and the results are shown in the chart below. What event most likely produced the changes that occurred in the wild plant ancestor?

• Mutations in wild mustard sex cells were passed on to offspring.

• Humans did not like to eat wild mustard.

• Competition for survival occurred in all ecosystems of the world.

• Ancient herbivores overgrazed wild mustard.

A strand of DNA in a skin cell contains the bases:

A-T-G-C-C-A-T-C-G-G-T-A

After the cell is exposed to ultraviolet light, the strand contains the bases:

A-T-G-G-C-C-A-T-C-G-G-T-A

Which statement describes the result of this exposure?

• A new base has been inserted.

• A base has been deleted.

• One base has been substituted for another.

• There have been no changes in the bases.