Which is most likely to be fossilized?
a.
hair
b.
eyes
c.
bones
d.
organs

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.