Biology SGA Review

1. A student is investigating the effect of plants on indoor air quality and states, “If plants are added to an indoor environment, the air quality will improve.” This statement is an example of –

• a procedure

• an observation

• a hypothesis

Which statement is an inference based on this information?

• Plant seeds have different shapes.

• Milkweed seeds are dispersed by wind.

• Maple seeds have a membrane-like extension.

• Burdock seeds have short, peg-like extensions.

What can be concluded from this graph?

• The reactants have less energy than the products

• The enzyme is consumed during the course of the reaction.

• The enzyme lowers the energy of activation for the reaction.

• The amount of free energy produced in the reaction increases with an enzyme.

Which feature do viruses have in common with animal cells?

• Ability to form proteins at the ribosomes.

• Existence of lipids in cell membranes.

• Presence of a genetic code in nucleic acid.

• Production of energy by a mitochondrion.

The diagram shown represents the input and output of a process performed by the chloroplast of a cell. Which substance is most likely represented by Y?

• Glucose

• CO₂

• ATP

• Light

In 1950, Erwin Chargaff discovered that the percentage of adenine in DNA equals the percentage of thymine, and that the percentage of cytosine equals the percentage of guanine. This proved invaluable to the eventual discovery of which aspect of DNA?

• Location

• Solubility

• Structure

• Volume

Red flower color is dominant to white flower color in rose plants. What is the expected result of a cross between two heterozygous rose plants?

• 100% red

• 75% red, 25% white

• 50% red, 50% white

• 25% red, 75% white

Darwin’s explanation for evolution was dependent on which scientific concept?

• The ability of organisms to learn

• The significance of social behaviors to survival

• The existence of variations in a population

• The relationship between size and survival

This chart shows observations made of an unknown organism. Based on this information, the organism most likely belongs to the kingdom –

• Fungi

• Plantae

• Eubacteria

• Animalia

For the growth curve to continue increasing, which of these must occur?

• The organisms must adapt to a new habitat.

• The organisms must migrate to a new environment.

• The resources in the environment must be unlimited.

• The environment must provide a habitat for a large variety of organisms.