Cast- solid copy
Mold- hollow form
Carbon film- details left after an organism decays
Trace fossil-record of an organisms activity
Petrified fossils- living things turned into rock
Primary reinforcers have distinctive reinforcing qualities; not learned. In addition, secondary reinforcers has no inherent value and only has reinforcing qualities when linked with a primary reinforcers. The positive reinforcement is a desirable stimulus is added to increase behavior while negative reinforcement is an undesirable stimulus is removed to increase behavior.
Answer:
To convert solar energy into chemical energy and then store the chemical energy for future use.
Explanation:
On Ed-genuity, the answer is D) medical books
I took the test
Answer:
to stop animals from eating plants
Explanation:
the thorns and spines help protect the plant for example if we touch the plant it hurts same goes with animals
