Midterm Review Flashcardizz #4

Front

What is the independent variable in an experiment?

Back

The independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable. In the context of the provided question, it is 'Temperature (degrees Celsius)'.

Front

What does a positive correlation in a graph indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also increases. In the context of photosynthesis, it means that as light intensity increases, the rate of photosynthesis also increases.

Front

What is the optimum light intensity in photosynthesis?

Back

The optimum light intensity is the level of light at which the rate of photosynthesis is maximized. Beyond this point, increases in light intensity do not lead to further increases in the rate of photosynthesis.

Front

Define osmosis.

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a process by which substances move across cell membranes with the assistance of special proteins, without the expenditure of energy.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles that fuse with the plasma membrane, releasing their contents outside the cell.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically along the concentration gradient.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy, usually in the form of ATP.

Front

What is the role of enzymes in biological reactions?

Back

Enzymes are biological catalysts that speed up chemical reactions in cells by lowering the activation energy required for the reaction to occur.

Front

What is a bell curve?

Back

A bell curve, or normal distribution, is a graph that represents the distribution of a set of data where most values cluster around a central peak and probabilities for values further away from the mean taper off symmetrically.