Answer:
The correct answer is - option A. mandible.
Explanation:
Mandible is the bone of jaw especially lower jaw. It is not a bone that protects any vital organ it just help to close and open mouth for essential mouth movements like eating and talking.
Sternum and Ribs are the bones that plays role in providing protection to vital organs such as heart and lungs. Vertebral column is the bone that protects spinal chord while providing stiffness to the body and back.
Thus, the correct answer is option A. mandible.
Answer: 21%
Explanation:
The atmosphere is the gaseous portion of the planet Earth. It therefore consists of several gases and air particles.
In the atmosphere,
-Nitrogen is the most abundant gas with 78%
- Oxygen takes 21%,
- Carbon dioxide takes 0.03%,
- the remainder is unreactive gases and particles.
Skin-block skin boundaries
muscle-give support
bone-protect and harden
joing-by ligaments, joints, tendons
The appropriate answer is EXCRETION. Excretion is the process by which metabolic waste products are eliminated from the body. Living things take in molecules from the environment and chemically change them into molecules that form their own structures, control their physiology and provide them with energy. Metabolism is the sum of these reactions. These reactions produce waste material that can be toxic to cells if they accumulate. Metabolism therefore requires the process of excretion.
