False. That question doesn't really make sense also but it should still be false given the context.
Answer:
c. single bond
b. double bond
d. unsaturated fatty acid
The rest is right :)
Explanation:
"C" is a single bond because saturated fats only have single bonds (no double bonds!)
Unsaturated fatty acids, on the other hand, have a double bond, creating a bent shape.
The answer is a. the abiotic components of an ecosystem
HIV directly attacks CD4 helper lymphocytes directly. (D)