Leona is making lemon pudding from "scratch." Her ingredients include fat-free milk, corn starch, lemon juice, egg yolks, salt, sugar, and butter. When she added some of the ingredients together, little clumps formed in the mixture before she could heat it. What happened to those ingredients?
a. The acid in the lemon juice denatured the milk proteins.
b. The cholesterol in the raw egg yolks reacted with the butter.
c. The salt activated the sugar after being mixed with the egg yolks.

According to the cladogram, which organisms have roundworms as a common ancestor?

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated

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.