How many cells are in ragweed pollen? what kind of cell is it? how big is it?

  25 µm

The diameter of a ragweed pollen grain is only 15–25 µm and the pollen surface is covered in short spines (Fig. 3). Ragweed pollen grains can be transported several hundreds to thousands of kilometers by air and can cause allergy symptoms in areas where the ragweed plant is not widespread. It is a Eukaryotic cell.

Explanation:

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.

the answer for this question would be d. glaciers