Answer:
Harmful
Explanation:
When you have an autoimmune disorder, your immune system does not distinguish between healthy tissue and potentially harmful antigens.
The answer is C. nitrogen.
Plants are main producers in ecosystems so, primary productivity of ecosystems depends on them. Carbon is necessary for plants, but it is widely present in plants. On the other hand, calcium and sodium are not as essential. However, nitrogen is important for plants because it is necessary to make proteins. Proteins take part in many different processes such as photosynthesis (this is actually primary productivity). But, nitrogen is not available to plants, they cannot absorb it simply from the air but rely on some symbiotic bacteria which are able to.
Answer: D
Explanation:
A) - Makes no sense, so no
B) - Experiments in laboratories must be controlled, so no.
C) - A laboratory is a regulated environment, so no.
D) - Only D makes sense, as it is true.
Answer:
I think the answer is A
Explanation:
The adult fish at 22 degrees is higher than the juvenile fish at 22 degrees, so it would make sense
