What did the narrator describe as tadpoles? what did leeuwenhoek predict was within the heads of these little tadpoles?

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

What do lava flows made of aa indicate about the type of volcanic eruption that occurred? a. the eruption was viscous. b. the eruption was pyroclastic. c. the eruption was explosive. d. the eruption was quite. !

How does a gymnosperm prevent itself from pollinating the same tree