Why does mouth water when you see food?Does it serve a purpose?

no because you want to become fat without doing any thing go read your textbok

you will find it on page 15  9 line 12 word Explanation:

Yes

Explanation:

When you see, smell or think of food your brain sends signals to the glands responsible for saliva production. ... We salivate as a reflex to prefer for the consumption and digestion of food. Saliva is needed to keep your mouth and teeth healthy so keep drooling people!

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.