NYSTCE Biology (006) Flashcards

Which of the following correctly describes natural selection?

Answer: Traits that enhance survival and reproduction become more common in a population over time

Natural selection is the process by which heritable traits that increase reproductive success become more prevalent across generations.

What is the function of the cell membrane?

Answer: To regulate what enters and exits the cell

The cell membrane is a selectively permeable barrier that controls the movement of substances into and out of the cell.

Which ecological level is represented by all the populations of different species living in the same area?

Answer: Community

A community consists of all the populations of different species that interact in a given area.

Which macromolecule is the primary structural component of cell walls in plants?

Answer: Cellulose

Cellulose is a polysaccharide that forms rigid plant cell walls, providing structural support.

What is the role of decomposers in an ecosystem?

Answer: They break down dead organic matter and return nutrients to the environment

Decomposers such as fungi and bacteria break down dead organisms and recycle nutrients back into the soil and atmosphere.

Which process moves water molecules from an area of higher water concentration to lower water concentration through a semipermeable membrane?

Answer: Osmosis

Osmosis is the passive movement of water across a selectively permeable membrane from high to low water concentration.