Embryonic development is divided into trimesters. Each list below shows the development that normally occurs during one trimester, though the lists are not in chronological order. Hair on skin, organs functioning, sleep cycle eyelids, major organs, fingernails eyes open and close, fastest weight gain

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.

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.

Many plants can reproduce asexually. which of these is an example of asexual reproduction in a plant? a. pine cones forming on a tree b. cross-pollination in a tomato c. roots sprouting from a potato d. night-blooming jasmine flowers