The bee's hairy thorax (middle section) is covered in pollen. Pollen is produced by male reproductive organs in the flower. Each grain of pollen contains a sperm cell.
B. What happens to the flowers?

Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

Which of these parts of the membrane large moecules pass through it ?