What is the ability to allow certain ions or chemicals into or out of a cell?

Why do yeast cells need atp? this is not a trick question. describe why cells need atp?

The process some organisms are able to use by which they convert light energy to chemical energy

Which is the best definition of activation energy? the energy required to end a chemical reaction the energy required to bind a substratewo an active site the energy required to form or break the bonds of reactant molecules the energy required to

True of False. Viruses are sometimes triggered into an active state by overexposure to sun, sickness, or stress.

1. Describe the plasma membrane, and explain why it is called a bilayer structure.

Soaps, by themseives, are examples of a. surfactants. b. degerming agents. c. antiseptes d. both a and b.

What are the 3 care instructions for future life on earth

If many trees are removed from a forest by logging, what is themost immediate effect on the carbon cycle in that forest? A. increased rates of decomposition B. decreased rate of atmospheric CO2 C. decreased combustion of fossil fuels D.

How many of Earth's plant species are used as agricultural crops? A) 1,000 B) 3,000 C) 5,000 D) 7,000 E) 9,000

Dendrites are branching cytoplasmic projections of neurons that receive impulses and transmit them to the cell body. a. True b. False