The main energy for prolonged muscle work comes from:
a. stored ATP
b. stored creatine phosphate
c. fermentation of carbohydrates
d. aerobic respiration of carbohydrates and fats
e. stored ADP
d
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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
One kind of plasmid in bacteria is called an R plasmid. What kinds of genes are typical of such plasmids?
What will be an ideal response?
What is the role of the epithelium?
A) Helps protect the body from the external environment B) Transmits electrical signals throughout the body C) Contracts to create body movement D) Provides the padding between the joints
The cross AaBb × AaBb is an example of a _______ cross and the results of such crosses led Mendel to propose what we now call the law of _______.
A: test; segregation of genes B: test; independent assortment C: dhybrid; independent assortment D: self; segregation of genes E: dihybrid; segregation of genes