NEED HELP ASAP

By the end of the second trimester of pregnancy,

A. all a human's body parts have been formed.
B. a human's brain has not yet formed.
C. all a human's body parts are fully developed.
D. a human's brain has not yet begun to function.

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.

Drag each label to the correct location in the equation. not all tiles will be used. the density of mercury is 13.6 grams per cubic centimeter. complete the steps for converting 13.6 g/cm3 to kg/m3. (1 kg = 1,000 g, 1 m3 = 106 cm3)

Drag the tiles to the correct boxes to complete the pairs. match each cell organelle with its description.