Which of the following statements is not true?
a. muscle growth is typically completed by about age 30
b. after age 30, there is typically a 10% loss of muscular strength until about 60, usually in the back and leg muscles
c. regular exercise has little impact on maintaining peak performance after age 30
d. after age 60, there is a significant loss of lean muscle mass and flexibility

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.

What is the role of dna ligase in the elongation of the lagging strand during dna replication?