Which kind of exercise helps your heart work more efficiently? a Strength training
b Aerobic exercise
c Anaerobic exercise
d flexibility training

Me with this i need to get the answer quickly.

List three reasons people may begin using tobacco

Some viruses can be crystallized and their structures analyzed. one such virus is yellow mottle virus, which infects beans. this virus has a single-stranded rna genome containing about 6300 nucleotides. its capsid is 25-30 nm in diameter and contains 180 identical capsomeres.if the yellow mottle virus begins its infection of a cell by using its genome as mrna, which of the following would you expect to be able to measure? a) replication rateb) transcription ratec) translation rated) formation of new transcription factors