PLEASE HELP FAST Which statement describes the high and low pressure systems and their affect on global climate?
A. High pressure systems bring colder temperatures from the north and south poles resulting in precipitation.

B. High pressure systems bring storms; low pressure systems bring sunny and fair weather.

C. High and low pressure systems do not affect the global climate.

D. Cold air from the poles create high pressure systems. Warm air at the equator creates low pressure systems.

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

The chemical form of energy that is useable by the cell to do work