a kayak travel in a lake at an average speed of 35 m/min if the perimeter of the lake was 8400 m how many hours does it take for the kayak to travel around the whole lake?

Does masterbation affect height growth or loss of growth hormone?

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.

The third stage of cellular respiration is (2 points)