What exhibits gill slits at some stage of its development

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?

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.