Working from deep geologic strata toward shallow geologic strata, what is the sequence in which fossils of these groups should make their first appearance?
1. charophytes
2. single-celled green algae
3. hornworts
4. plants with a dominant sporophyte

Where in the body can you find chemoreceptors? a. on the skin and ears, to detect pressure, touch, motion, and sound b. on the retina, to detect a single photon of light c. on the skin, to detect temperature or specific chemicals d. on the tongue and in the nose, to detect taste or odor

What is the function of nucleic acids

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun