~~10. a crisp head of romaine lettuce was purchased from a local grocery store. the customer who purchased the lettuce noticed that the store's produce was constantly sprayed with distilled (pure) water. once home, they noticed that the leaves of the lettuce no longer seemed as crisp and taut. using details learned about osmosis, explain why the lettuce was crisper at the store

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

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.

What are the fixed alleles in the human species? o a. the alleles that are on the most chromosomes b. the alleles that change most often 000 c. the alleles that no one has d. the alleles that everyone has