Hydrangea plants of the same genotype are planted in a large flower garden. Some of the plants produce blue flowers and others pink flowers. This can be best explained by which of the following?
A. the knowledge that multiple alleles are involved
B. the allele for blue hydrangea being completely dominant
C. the alleles being codominant
D. environmental factors such as soil pH
Select your answer:
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Forensics: Blood › Viewanother name for red blood cells
A. leukocytes
B. erythrocytes
C. platelets
D. leukocytes
Animal Nutrition › View
Describe the importance of nitrogen-fixation in the nitrogen cycle.
A. Convert atmospheric nitrogen into a usable form for plants
B. Releases harmful gases into the atmosphere.
C. Nitrogen-fixation occurs solely in aquatic environments
D. Nitrogen-fixation is only important for animal health