4/21 Review 4

A child with cystic fibrosis has an altered protein in his cells that stops chloride ions from leaving the cells. This protein most likely affects the functioning of

• cell membranes

• nuclei

• mitochondria

• ribosomes

The graph below represents the number of brown and green beetles collected in a particular ecosystem.

The change observed in the number of green and brown beetles in the population is most likely due to

• natural selection

• selective breeding

• gene manipulation

• common ancestor

For centuries, humans have used resources from coastal areas and open ocean waters. An example of an activity that would promote the conservation of coastal areas and ocean resources is

• harvesting large numbers of different fish species

• allowing all-terrain vehicles access to beach areas

• creating protected zones of natural grasses and shrubs in beach areas

• encouraging the construction of factories along the shoreline

It is recommended that people avoid excessive use of tanning beds. Exposure to the radiation emitted by tanning beds can cause skin cancer. This cancer is the direct result of a

• change in a starch molecule

• mutation in the genetic material

• mutation in a protein

• change in a fat molecule

The following events occur during sexual reproduction:

A. mitosis

B. meiosis

C. fertilization

D. birth

Which sequence represents the correct order of these events during sexual reproduction?

• A → C → B → D

• B → C → A → D

• C → B → A → D

• B → A → C → D

Which stage of meiosis is this?

• Metaphase 1 because homologous chromosomes are lined up along the center of the cell

• Metaphase 1 because individual chromosomes are lined up along the center of the cell

• Metaphase 2 because homologous chromosomes are lined up along the center of the cell

• Metaphase 2 because individual chromosomes are lined up along the center of the cell

In science, a broad body of evidence, subject to revisions, supported by different kinds of scientific investigations and often involving the contributions of scientists from different disciplines is necessary to develop

• A theory

• A fact

• A prediction

• An inference

Jeanette is testing different fertilizers. She gathers 5 different tomato plants. One one she uses no fertilizer. On the other four she uses one type of fertilizer each. She then measures the height of the tomato plants every day for 30 days.

Which of these is NOT labeled correctly?

• Independent variable: Type of fertilizer used

• Dependent variable: Height of the tomato plants

• Control: The tomato plant without fertilizer

• Hypothesis: The tomato plant that gets the most fertilizer will produce the most fruit.

Which population has the greatest chance of survival in a rapidly changing environment?

• 1

• 2

• 3

• 4

A cell in the leaf of a corn plant contains more chloroplasts than a cell in the stem of a corn plant. Based on this observation, it can be inferred that, when compared to the cell in the stem, the cell in the leaf

• synthesizes more sugar

• has a higher chromosome count

• produces fewer proteins

• uses less carbon dioxide