A substance that speeds up a rate of a chemical reaction I called

Which organism is not made up of cells that each contain a membrane-enclosed nucleus? A) possum B) bacterium C) mushroom D) paramecium

The types of organisms you would expect to see in an area that recently experienced a volcanic eruption. a. trees b. mosses and algae c. grass and bushes d. all types of organisms in fewer numbers

A plant grows in soil contaminated with toxins. through which structure would the toxins first enter the plant

What's the function of the digestive system

Why is light external to plants

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.