Imagine a forest of leafy, deciduous trees living in these conditions. plants need water to survive; they need water for photosynthesis. in this situation, we would expect the stomata in the leaves of the deciduous trees to a) open less frequently to slow the rate of photosynthesis. b) open less frequently to restrict transpiration and conserve water. c) open more frequently to allow more water to enter the trees' tissues. d) open more frequently to allow water and co2 into the leaf tissue.

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

What did hunter gathers do to alter the environment?

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.