Answer:
The correct answer would be option A.
Explanation:
Cell mediated immunity in which antibodies are not required. It is mediated by phagocytes, cytokines released for specific antigens, and antigen-specific cytotoxic T-cells. cell mediated immunity is refers to the fact that the response is driven by cytotoxic cells.
Cell-mediated immunity can be obtained through T cells from someone who is immune to the particular infection.
Helper T cells help activate cytotoxic T cells and macrophages to attack infected cells.
Thus, the correct answer is option A.
Answer:
The false statement is A. RNA is double stranded.
Explanation:
RNA isn't double-stranded, it only has one strand. RNA is a genetic molecule that is formed through the transcription process. There are many kinds of RNA, the most important ones are mRNA (messenger) and tRNA (transfer) that are involved in transcription in order to synthesize proteins.
Answer:
Plant cells have a cell membrane and cell walls for support, but animal cells do not have cell walls.
Protein modification and storage.
Answer:
Food and habitat resources
Explanation:
Ecosystems are communities that animals and organisms fight and survive in.