NC Biology Released Exam 2019

Front

What happens to a red blood cell in a hypertonic solution?

Back

The red blood cell will shrink from losing water molecules.

Front

What is the primary function of the contractile vacuole in a Paramecium?

Back

To regulate water balance and expel excess water.

Front

What was the basis for the earliest classification system of organisms?

Back

Physical characteristics.

Front

What can be inferred if two species share similar larval stages?

Back

They share a common ancestor.

Front

What carries the instructions for making amino acids in a protein?

Back

The sequence of nitrogen bases on the mRNA.

Front

Define osmosis.

Back

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 a unicellular organism?

Back

An organism that consists of a single cell.

Front

Explain the role of mRNA in protein synthesis.

Back

mRNA carries the genetic information from DNA to the ribosome, where proteins are synthesized.

Front

What is the significance of physical characteristics in classification?

Back

They help in identifying and grouping organisms based on observable traits.

Front

What is a common ancestor?

Back

An ancestral species from which two or more species have evolved.