Biology

What is a capillary?

Capillaries are the smallest blood vessels in the body, connecting arteries and veins, and facilitating the exchange of oxygen, nutrients, and waste between blood and tissues.

What is the job of an artery?

The job of an artery is to carry oxygenated blood away from the heart to various parts of the body.

What is cell theory?

Cell theory states that all living organisms are composed of cells, and that cells are the basic unit of life.

What are the main components of a cell?

Main components include the cell membrane, cytoplasm, nucleus, and organelles such as mitochondria and ribosomes.

What is photosynthesis?

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

What is the purpose of cellular respiration?

Cellular respiration is the process by which cells convert glucose and oxygen into energy, carbon dioxide, and water.

Define osmosis.

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

What are enzymes?

Enzymes are biological catalysts that speed up chemical reactions in the body without being consumed in the process.

What is genetic variation?

Genetic variation refers to the diversity in gene frequencies within a population, caused by mutations, gene flow, and sexual reproduction.

What are the stages of mitosis?

The stages of mitosis are prophase, metaphase, anaphase, and telophase.

What is evolution by natural selection?

Evolution by natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.

What is the function of the ribosome?

Ribosomes are responsible for synthesizing proteins by translating messenger RNA into polypeptide chains.

What are prokaryotic cells?

Prokaryotic cells are simple, single-celled organisms without a nucleus or membrane-bound organelles; examples include bacteria and archaea.

What are eukaryotic cells?

Eukaryotic cells are complex cells that have a nucleus and membrane-bound organelles, found in organisms such as plants, animals, fungi, and protists.