Which of these is a true statement?

a. surface currents have a warming effect on the climate of nearby land.
b. surface currents move in circular patterns across the earth.
c. surface currents affect only shallow water temperatures.
d. surface currents are not affected by the coriolis effect.

What is the most abundant vertebrate on earth?

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.

Which of the following describes a bathypelagic zone