Life Science Final Review

Front

What is the theory of punctuated equilibria?

Back

A theory that suggests evolution occurs in rapid bursts followed by long periods of stability, rather than slowly and steadily.

Front

What are the components of a DNA ladder?

Back

Each rung of the DNA ladder is made of a pair of nitrogen bases.

Front

What is the cell theory?

Back

The cell theory states that all living things are composed of cells, cells are the basic unit of life, and all cells arise from pre-existing cells.

Front

What is a karyotype?

Back

A karyotype is a picture of the chromosomes in a cell, used to examine chromosomal abnormalities.

Front

Why is water essential for cells?

Back

Most chemical reactions in cells require water, making it vital for cellular processes.

Front

What is the function of ribosomes in a cell?

Back

Ribosomes are responsible for protein synthesis by translating messenger RNA (mRNA) into polypeptides.

Front

Define homeostasis.

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite external changes.

Front

What is the role of enzymes in biological reactions?

Back

Enzymes act as catalysts to speed up chemical reactions in the body without being consumed in the process.

Front

What is the difference between prokaryotic and eukaryotic cells?

Back

Prokaryotic cells lack a nucleus and membrane-bound organelles, while eukaryotic cells have a nucleus and organelles.

Front

What is natural selection?

Back

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.