Biology PMA 2 Review 23/24

Front

What is a heterotroph?

Back

A heterotroph is an organism that cannot produce its own food and instead obtains its nutrients by consuming other organisms. Another term for heterotroph is 'consumer.'

Front

What is the hydrologic cycle?

Back

The hydrologic cycle, also known as the water cycle, is the continuous movement of water between Earth's oceans, atmosphere, and land through processes such as evaporation, condensation, and precipitation.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants, algae, and some bacteria use sunlight to convert carbon dioxide and water into carbohydrates (glucose) and oxygen.

Front

What is respiration in the context of the carbon cycle?

Back

Respiration is the process by which living organisms, including both plants and animals, convert glucose and oxygen into energy, releasing carbon dioxide and water as byproducts.

Front

What is a primary consumer?

Back

A primary consumer is an organism that feeds on primary producers (plants) in a food web. An example of a primary consumer is a mouse, which eats plants.

Front

What is a producer in an ecosystem?

Back

A producer is an organism that can make its own food through photosynthesis or chemosynthesis, serving as a source of energy for primary consumers. Examples include plants and algae.

Front

What is the carbon cycle?

Back

The carbon cycle is the process by which carbon is exchanged among the atmosphere, land, water, and living organisms, involving processes such as photosynthesis, respiration, and decomposition.

Front

What is chemosynthesis?

Back

Chemosynthesis is the process by which certain organisms, such as bacteria, convert carbon molecules and nutrients into organic matter using the oxidation of inorganic molecules as an energy source, instead of sunlight.

Front

What role do decomposers play in an ecosystem?

Back

Decomposers break down dead organic matter, returning nutrients to the soil and making them available for use by plants, thus playing a crucial role in nutrient cycling.

Front

What is transpiration?

Back

Transpiration is the process by which water is absorbed by plant roots, moves through plants, and is released as water vapor through pores in leaves, contributing to the water cycle.