If a star is 300 light-years from earth, how long does it take light from that star to reach earth? 300 light-years 300 years 300 hours 300 days

Ialready know the answers to these questions and they are on the attachment. but i just need to know why that answer is the correct one. plz asap! this is for a report that i need to email by 10!

Dna, in the nucleus carries the genetic code for making proteins in ribosomes. in the diagram, b, represents the proteins produced. dna cannot leave the nucleus to carry the genetic information to the ribosome where proteins are produced. how does the genetic code get from the nucleus to the ribosome? what does a represent? now

What happens when a plant is losing too much water through transpiration? question 14 options: stomata open stomata close guard cells swell respiration increases