CJ 3rd QER Science 7 A

The basic units of all organisms that can perform all life’s functions and the lowest level of biological organization.

It is a group of similar cells that work together to carry out a specific function.

A system of tissues grouped together to perform a common function.

A higher level of organization that consists of different organs that work together to perform related bodily functions.

It consists of multiple organ systems with different functions that work together and a living thing that performs all basic life processes.

It is a group of organisms of the same species living in a particular area.

The sum of populations living within a certain area.

It is a community of organisms interacting with one another and with its abiotic (non-living elements, e.g., light, air, rocks) environment.

The sum of all ecosystems. It includes every plant, animal, human, microorganism, and nonliving things such as land, water, and atmosphere on Earth.

He first discovered a cell by observing very thin slices of cork under a microscope. He saw closely-packed little compartments with thick walls. He named these compartments ‘cells ’ from the Latin word cellula , which means small rooms.