A food product was produced at room temperature (20°C) and its water activity was 0.3. Then it was shipped to a store and its temperature was 30°C during shipping, which of the following could happen? a. The product water activity will increase
b. The water content of the product do not changed
c. The product may be spoiled faster than expected
d. All of the above

Hey me with this one❤☺❤ how do you say that a cell also has a life span and death like an organism? give one example.

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.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?