What do geneticists call alleles that are both expressed in the phenotype when they are together?
a. hybrids
b. codominance
c. heterozygous
d. incomplete dominance

Which statements correspond to cellular respiration? co2 diffuses passively into the cell. co2 diffuses passively out of the cell. co2 must be pumped out of the cell. o2 diffuses passively when produced inside the cell. o2 diffuses passively when converted to co2. o2 is pumped in and forces co2 out.

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight

Explain how the political influence of african americans leaders became weaker.