Help pls :( don’t understand
...
Answers: 3
Biology, 22.06.2019 01:30
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.
Answers: 1
Biology, 22.06.2019 18:30
Can happen anywhere along the spine if the neural tube does not close all the way. the backbone that protects the spinal cord does not form and close as it should. this often results in damage to the spinal cord and nerves. a) cleft palate b) spina bifida c) encephalocele d) down's syndrome
Answers: 3
Biology, 23.06.2019 02:30
Adaptive radiations can be a direct consequence of four of the following five factors. select the exception. a) vacant ecological niches b) genetic drift c) colonization of an isolated region that contains suitable habitat and few competitor species d) evolutionary innovation e) an adaptive radiation in a group of organisms (such as plants) that
Answers: 3
English, 26.04.2021 21:30
Chemistry, 26.04.2021 21:30
Computers and Technology, 26.04.2021 21:30
Computers and Technology, 26.04.2021 21:30
Geography, 26.04.2021 21:30
Mathematics, 26.04.2021 21:30
History, 26.04.2021 21:30
History, 26.04.2021 21:30
History, 26.04.2021 21:30