Which types of embryos have pharyngeal slits?

Chordates

Explanation:  

Pharyngeal slits are found in the embryos of the chordates. Pharyngeal slits are the filter organs present in the chordates. These are the openings in the pharynx near the mouth. The function is to allow the movement of water inside the mouth and the unwanted or excess water is removed by the pharyngeal slits. These slits also aid in respiration of the aquatic chordate animals.  

it cools slower in the earth meaning the crystals have more time to form than lava on the surface

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles