Introduction to Biology

Chemotaxis is the movement of organisms toward or away from chemicals, while phototaxis is the movement toward or away from light.

Single-celled organisms duplicate their DNA first, then the cell divides to form two new cells.

Homeostasis is the ability of an organism to maintain constant internal conditions.

Macromolecules are large molecules formed by polymerization, combining smaller units called monomers.

The four elements common to all living organisms are oxygen, carbon, hydrogen, and nitrogen.

Order, sensitivity to the environment, and movement in response to stimuli

In the last 200,000 years

The study of living organisms and their interactions with one another and their environments.

Zoology

The study of the structure and function of microorganisms.

Chemotaxis is the movement of an organism toward or away from chemicals. An example of an organism that exhibits chemotaxis is bacteria moving towards nutrients.

Plants capture energy from the sun through photosynthesis and convert it into chemical energy in food.

Organelles are small structures within cells that perform specific functions. Examples of organelles include mitochondria and chloroplasts.

Macromolecules are large molecules formed by polymerization. They are different from regular molecules as they consist of many smaller units called monomers.

The four elements common to all living organisms are oxygen, carbon, hydrogen, and nitrogen. These elements form the fundamental components of nucleic acids, proteins, carbohydrates, and lipids.