2. deciduous teeth eruption in children generally starts at the
age
a. 6 years
b. 6months
d. 1 year
c. 2 years

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?

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?

What is required in the genotype of an individual to show a recessive trait? a. two recessive alleles b. at least one recessive allele c. no recessive alleles