1. True-or-false: All of the substances present in nature are made up of less than 100 types of particles. These particles are called molecules.

False

Explanation:

there are billions of known molecules.

Answer is below

Explanation:

Frogs and humans share the same basic organs. Both have lungs, kidneys, a stomach, a heart, a brain, a liver, a spleen, a small intestine and a large intestine, a pancreas, a gall bladder, a urinary bladder and a ureter. ... On the whole, their organ structure is similar, but frogs have considerably less complex anatomies