The correct answer is <span>D. circulatory, respiratory, nervous, endocrine
The other systems mentioned in the first three examples don't maintain oxygen levels at that body strain level.</span>
Virus: Vaccine, Antibiotics are not useful, Is not an organism
Both: Curable, Harmful to humans, Deadly
Bacteria: No vaccine, Antibiotics are useful, Is an organism
<span>hromoplast is the generic term but is usually used to refer only to those plastids that do not have chlorophyll.</span>
Answer: B. Rainforest
Explanation:
Because rainforests have huge canopies of trees, it is significantly harder for the plants below them to get sunlight.