Explanation

Elephants have 56 chromosomes in total, which means 28 pairs.

These chromosomes carry genetic information essential for their growth, reproduction, and survival.

Explanation

 Closed System:

In a closed system, social status is largely determined at birth and individuals have limited or no ability to move up or down the social hierarchy. 

Examples of Closed Systems:

Traditional caste systems and feudal estate systems are examples of closed systems where social mobility is severely restricted

Explanation

 Anaerobic Organisms: Anaerobic organisms, including certain bacteria, are those that do not require oxygen for growth and survival. 

Oxygen Toxicity: Some anaerobic bacteria are highly sensitive to oxygen and cannot tolerate its presence, while others can tolerate small amounts of oxygen. 

Explanation

Explanation

Amphibians (like frogs and salamanders) have a three-chambered heart consisting of two atria and one ventricle.

This allows partial mixing of oxygenated and deoxygenated blood, making their circulation less efficient than mammals.