Answer:
C
Explanation:
A is wrong as 3 pathways are: classical, lectin, alternative
B is wrong - many C1-C9 act in other 2 ways EX C5
D is wrong - MAC consists of C5-C9
The Kupffer cells protect the liver from bacterial infections
Answer:
Hunting in groups, keen eyesight, chemicals to paralyze prey
Explanation:
A substance used, or acted on, by another process or substance such as a reactant in an enzyme catalysed reaction.
Explanation:
Greenhouse effect, a warming of Earth's surface and troposphere (the lowest layer of the atmosphere) caused by the presence of water vapour , carbon dioxide, methane, and certain other gases in the air. Of those gases, known as greenhouse gases, water vapour has the largest effect.