What do you think about scientists around the world prefer to use SI units instead of other kind of units?

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

How do disease caused by bacteria and disease caused by viruses react to antibiotics?

12) several teeth were found in an area of flat land covered with trees and plants. the teeth were examined by a paleontologist, and it was determined that the teeth came from a shark. they found many other shark teeth in this area. however, the people who discovered the teeth were puzzled, because there was no source of water near where the fossils were found. what is the paleontologist's best explanation for why the teeth were found in this area? a) sharks used to live on flat land. b) this area was once covered with salt water. c) this area was once covered with freshwater. d) someone buried the shark teeth deep in the ground.