If a plant species exhibits maternal inheritance for leaf pigmentation, what is the phenotype of the parents of a variegated (green and white leaves) plant?
A. The maternal plant must be white and the paternal plant must be green.
B. The maternal plant must be green and the paternal plant must be white.
C. Both the maternal and paternal plant must be variegated.
D. The maternal plant must be variegated and the paternal plant can be any color.
E. The maternal plant must be variegated and the paternal plant must be white.
Answer: D
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Every 24 hours, every genome in every cell of the human body is damaged 10,000 times or more
Given the possible DNA repair mechanisms, which order listed below would be most effective at repairing these as quickly as possible in order to prevent mutations from being carried forward in DNA replication? A. Proofreading by DNA polymerase, glycosylase enzyme activities, excision repair, SOS repair B. SOS repair, excision repair, glycosylase enzyme activities, proofreading by DNA polymerase C. SOS repair, proofreading by DNA polymerase, glycosylase enzyme activities, excision repair D. Glycosylase enzyme activities, SOS repair, proofreading by DNA polymerase, excision repair
The target tissue for erythropoietin is ____
a. brain b. kidney c. liver d. bone marrow e. lungs
Darker skin color is correlated with ____
a. the northern hemisphere b. inland regions c. coastal regions d. longitude e. the intensity of UV radiation
The kidneys excrete metabolic wastes, including urea, a by-product of glucose metabolism.
Answer the following statement true (T) or false (F)