Most animal cell membranes have proteins that pump what ions out of the cell and potassium ions into the cell.
a. calcium
b. carbon
c. magnesium
d. sodium

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

Match the following terms and definitions. 1. species that are adapted to live in equilibrium at carrying capacity population density 2. population growth that reaches equilibrium and carrying capacity population 3. death rate mortality 4. birth rate k-selected 5. a group of interacting individuals of the same species within the same geographic area natality 6. the number of organisms living in a particular area logistic growth