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question 45

Multiple Choice

Matching
Choose the correct answer from the list.Not all the answers will be used.

-Organisms known as _____ can fix nitrogen into metabolically useful molecules.


Definitions:

Cytoplasm

The material or protoplasm within a living cell, excluding the nucleus, filled with organelles and is the site of most cellular activities.

Right Atrium

The upper right chamber of the heart that receives deoxygenated blood from the body through the vena cavae.

Right Ventricle

The chamber within the heart that pumps deoxygenated blood to the lungs through the pulmonary artery.

Limbs

Appendages of the body, such as arms and legs, used for movement and manipulation of the environment.

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