Which statement best describes why warm ocean currents are usually surface currents?

a) warm water is less dense than cold water.

b) ocean tides bring warm water to the surface.

c) warm water contains more salt than cold water.

d) ocean water loses heat to the air at the surface

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim

Which of these parts of the membrane large moecules pass through it ?

Glands that the body deal with stress and respond to emergencies.