What type of glands are the gastric glands

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Which of the following is not a potential result of deforestation?

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer