Marcus is completing a science experiment for class. He wants to see what effect water temperature has on plants. If his experiment contains
one independent variable, which of the following would NOT be a
constant in his experiment? SC. H.1.3.2
A. the type of plant used
B. the water temperature
C. the room temperature
D. the pot used for the plants

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.

Beth’s hygrometer is reading a temperature of 30 c and a relative humidity of 65%. the humidity in the air is?

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million