Which of the following is true? A. By the time you reach your 20's, your bones will reach their maximum strength. B. It is important that children get enough calcium and vitamin D to prevent osteoporosis. C. Most kids oroduce enough vitamin d. D. All of the above

The only part of the body that should touch the ball when setting in volleyball

Why do rna viruses appear to have higher rates of mutation? a) rna nucleotides are more unstable than dna nucleotides. b) replication of their genomes does not involve proofreading. c) rna viruses can incorporate a variety of nonstandard bases. d) rna viruses are more sensitive to mutagens.

Which of these is a fact about performance enhancing drugs? a. steroids lack addictive properties. b. steroids use can cause dangerous side effects. c. it is safe to use steroids when working out. d. a person can get in legal trouble for using steroids.