Biology Midterm Review

Front

What gas do we breathe out that plants use for photosynthesis?

Back

Carbon dioxide (CO2) is the gas we exhale, and it is utilized by plants during photosynthesis.

Front

What is osmosis?

Back

Osmosis is the movement of water across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What role do enzymes play in chemical reactions?

Back

Enzymes lower the activation energy required for a reaction to occur, thus speeding up the reaction.

Front

In a scientific experiment, what is the dependent variable?

Back

The dependent variable is the outcome that is measured, which in this case is the test scores.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that allows substances to cross membranes with the assistance of special proteins.

Front

Define photosynthesis.

Back

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.

Front

What is the difference between active transport and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What is a hypothesis?

Back

A hypothesis is a testable statement or prediction about the relationship between two or more variables.

Front

What is the function of chlorophyll in plants?

Back

Chlorophyll is a pigment found in plants that absorbs light energy, primarily from the sun, to facilitate photosynthesis.

Front

What is the role of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, maintaining homeostasis.