What do mitochondrial and thylakoid membranes have in common?

a. they both use energy carriers that were made in the krebs cycle.
b. they both are involved in cellular respiration in animal cells.
c. they both contain the chlorophyll pigment.
d. they both use atp synthase proteins in atp production.

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.

Photosynthesis uses co2 and cellular respiration produces co2. we call the point when the two processes are in balance--when there is no net production of co2--the compensation point. how might you limit one of the processes in order to achieve a compensation point?

How does secondary succession differ from primary succession?