Another name for unicellular organisms that dominated Earth up to the Precambrian time is

A. eukaryotes.

B. cyanobacteria.

C. stromatolites

D. prokaryotes.

How have frogs evolved from 500 mpa to 250 mya?

Molecules move in and out freely from high to low concentration

Which type of cell has organelles that are bound?

What concept proposes that traits acquired in a person's lifetime become incorporated into that person's hereditary information and are passed on to offspring? a. blending inheritance b. preformationism c. Mendelian inheritance d.

Which systems act on the same organs but in opposite ways? a. the central and peripheral nervous systems b. the sympathetic and parasympathetic nervous systems c. the somatic and enteric nervous systems

What does the lac operon in bacteria code for?

Egg and sperm are a type of these?

What is Chemical digestion?

Where would sugar most likely be present in water?

When water is absorbed from the chyme, it becomes what?