Answer:
C
Explanation:
An ecosystem food chain always starts with producers
Consumers then consume the energy from producers (prey on them)
Decomposers are organisms which break down dead material and provide energy to the environment for which producers can use which creates a looped cycle
D both a and c sounds correct
Mark the pink dot with “phosphate group”
mark the blue one with “nitrogen bases”
Answer:
Chemicals that are secreted from antigen-presenting cells then activate helper T cells.
Explanation:
