B) a smokestack for an electric power plant
Answer:
- It has a vital role. It is the only way out of the optic nerve. By this hole optic nerve exits from the eye and goes towards the brain.
- It can be proved by a simple experiment. A paper sheet is taken. Then a cross and a circle are drawn side by side on that paper. Then we will focus on the cross. Then by closing one eye and by bringing the paper slowly towards our face, the circle will be disappeared at a certain point.
Explanation:
The blind spot is a region on the retina where ganglion cells connect with the optic nerve, and the optic nerve and blood vessels leave the eyeball. There are no receptors in this area so nothing can be translated into vision. That's why the blind spot is unable to see things.
Answer: phytoplankton
Explanation: shrimp and krill are primary consumers. Primary consumers rely on producers for food. Phytoplankton are producers.
Animal cells contain dna enclosed in the nucleus
Answer:
C using gas for heat
Explanation:
only thing that uses fossil fuels
