The Vascular system transports water and sugars throughout the plant during photosynthesis.
Rabbits do not have much of en energy reserve
Answer:
answer is 2 for both cuz they both have the 2 subscript next to hydrogen
Answer:
Helper T cells are arguably the most important cells in adaptive immunity, as they are required for almost all adaptive immune responses. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells.
Explanation:
Helper T cells become activated when they are presented with peptide antigens by MHC class II molecules, which are expressed on the surface of antigen-presenting cells (APCs). Once activated, they divide rapidly and secrete cytokines that regulate or assist the immune response.
The evolution of a species of organisms over time.
