In the Igf-2 allele, which chromosome is imprinted? Which is expressed?
A. Paternal, paternal
B. Paternal, maternal
C. Maternal, paternal
D. Maternal, maternal
A
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Where does meiosis occur in a flowering plant? I) megasporocyte II) microsporocyte III) endosperm IV) pollen tube
A) only I B) only II C) only III D) I and III E) I and II
Over 380,000 species of angiosperms exist on Earth. Which of the following factors contributed to this diversity of flowering plants? Select all correct choices
A. pollination by different insects B. infections by different bacteria C. predation by different herbivores D. infections by different fungi
Viruses have typical cellular structure like other living organisms.
Answer the following statement true (T) or false (F)
Which of the following factors may influence an enzyme's activity by altering its three-dimensional structure?
A) pH, temperature, and competitive inhibitor B) pH C) pH and temperature only D) temperature E) competitive inhibitor