Which motion of particles across a membrane requires energy? . a) from high concentration to low concentration. b) from low concentration to high concentration. c) with no concentration gradient. d) through dynamic equilibrium

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Identify characteristics of energy from the sun. check all that apply. almost all of the energy on earth comes from the sun. energy from the sun is known as mechanical energy. the energy in fossil fuels originally came from the sun. plants convert the energy of sunlight into chemical energy.

3test questions with answers on incomplete dominance