Answer:
<u><em>The correct option is D) Keystone</em></u>
Explanation:
In environmental studies, a keystone animal can be described as one of the most vital element or animal or a particular community. In a food chain, the keystone animal is of particular importance and if it is removed then the entire food chain will be affected by it.
In the scenario discussed in the question, Cheetahs are the keystone animals. Their absence will result in the disruption of the entire ecosystem of the forest. Hence, option D is correct.
Answer:
The bones of a synovial joint are surrounded by a synovial capsule, which secretes synovial fluid to lubricate and nourish the joint while acting as a shock absorber. The ends of the joint bones are covered with smooth, glass-like hyaline cartilage which reduces friction during movement.
Explanation:
hope this helps
Answer:
A. One antigen may have many different antigenic determinants and may therefore cause the formation of more than one antibody.
Explanation:
An antigen refers to a substance that triggers the immune system to produce antibody against it. Antigen can come in different forms, namely;
- Bacteria
- Viruses
- Pollen grains
In addition, antigens can also be produce in the body thereby stimulating antibody production likewise.
Answer: 5.7%
Given:
<span> 350
j (total energy)</span>
<span> 180 j (excretion in feces)</span>
<span>150 j ( energy for respiration)</span>
Solution:
Let X= energy left in the body
X=350-180-150
X=20 j
Production efficiency is:
<span>20/350=5.7%</span>
Answer:
c
Explanation:
it involves only the movment of water molecules