Red-flowering snapdragons are homozygous for allele r1. white-flowering snapdragons are homozygous for allele r2. heterozygous plants (r1r2) bear pink flowers. what phenotypes should appear among f1 offspring of the crosses listed below? what are the expected probabilities for each phenotype?

a neutral ph of 7 and normal organism temperature is needed for a certain enzyme to be effective.  

what would happen to the enzyme if the ph and/or temperature fluctuate greatly from the norm?  

a.the enzyme’s hydrogen bonds will break.  

b.the activation energy will increase.  

c.more product will be formed.

d.the ideal temperature and ph for the enzyme function will decrease.  

the answer is cell division : )

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.