Which of these allows you to distinguish between scents? a- chemoreceptors on the tongue
b- chemoreceptors in the nose
c- photoreceptors in the eye
d- mechanoreceptors in the ear

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

Why does bubbling occur when vinegar mixed with baking soda

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid