2. Who identified animalcules? What are animalcules?

Van Leeuwenhoek(created it)-- (definition)

a microscopic animal

For example- bugs

organisms that are both used in toothpaste as well as cause malaria are protista and monera.

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.