A scientist wants to see if there are less butterflies in places where people spray for mosquitoes. He finds thirty yards where people spray for mosquitoes every week. He visits the yards for one hour every week and counts all
the butterflies he sees. There aren't very many

Physical characteristics of down syndrome

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?

How do temperature and salinity affect deepwater currents? question 15 options: as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.