Which of the following activities would provide a cardio workout? a. doing abdominal exercises for 45 minutes. b. lifting weights for one hour. c. stretching for 30 minutes. d. swimming for 40 minutes.

Which of the following is a health risk associated with ground-level ozone? a.cataractsb.skin cancerc.respiratory illnessd.all of the above

What is psychological dimensions? (meaning)

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.