<span>ependymal cell.........................................</span>
The correct option is C.
Primary reinforcer refers to the basic needs of an animal, such as food, water, shelter, etc. Secondary reinforcer, which is also called condition reinforcer refers to the condition in which a stimulus reinforces a behavior after it had been associated with a primary reinforcer.
In the question given above, the primary reiforcer is food.
The correct answers, as I have just taken the test are:
A. Stem that stores water
A. Biodiversity
A. Migrating farther into the sea
D. Species diversity
B. Habitat loss
I know for an absolute fact these are correct.
It's because a blueprint is something that is like the backbone of something. It forms whatever the project is. Dna is what forms us and creates us.
