What is created when chemical reactions join atoms together?

electrons

isotopes

matter

bonds

Which of the following is a plant structure that aids in water retention? A) Cellulose B) Cuticle C) Vascular tissue D) Cell wall

The process of diffusion requires A. a concentration gradient B. none of the above C. ATP D. a vesicle

Warm fronts appear on weather maps in areas of

The links between the energy that carnivores get from eating to the energy captured by photosynthesis is what

12. Which of the following statements is true regarding biological cell theory? a. All organisms are made of cells c. All cells come from mitosis b. All cells possess a nucleus d. All cells come from meiosis

In everyday life, a theory is an educated guess. In science a theory is

How can invasive species result in changes in other populations?

the classes are playing tug of war. Mrs. Larson's homeroom pulls with a force of 50N. Ms. Mitko's homeroom pulls with a force of 45 N in the opposite direction. What is the net force? And who won?

The synaptic cleft is the area between the a. soma of one neuron and the dendrite of another neuron. b. axon of one neuron and the dendrite of another neuron. c. axon of one neuron and the soma of another neuron. d. somas of two neurons.

When the blades of a fan move, they have mechanical energy. This mechanical energy comes from A. electrical energy flowing into the fan from the wall outlet. B. sound energy flowing into the fan from a radio. C.