Select all the correct answers. Which three of the following steps in the carbon cycle describe how carbon moves between Earth's subsystems?

When fossil fuels are burned, they release carbon dioxide into the air.

Decaying organic material buried in the crust turns into fossil fuels.

Plants use carbon dioxide in the air to perform photosynthesis.

Animals use carbon stored in plants by eating them.

Carbon dioxide in the air is dissolved in the oceans' shallow waters.

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.

Organisms that successfully adapt will leave to grownone of the above

The cluster of developing cells from conception until birth is called an