Which protist would most likely be phytoplankton?
A) Kelp (a brown seaweed)
B) Plasmodium falciparum (the pathogen that causes malaria)
C) Polysiphonia (a red seaweed)
D) Euglena (a unicellular alga)
E) Phytophthora infestans (the pathogen that causes late-blight)

Metamorphic rocks are formed when sedimentary or igneous rocks are subjected to heat or pressure and recrystallize without melting. which of the following rocks results from the metamorphism of limestone? a. granite b. slate c. sandstone d. marble

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

What have we learned from fossil evidence about evolution? a) it is an abrupt change. b)the process is observable. c) it takes place during one lifetime only. d)the most complex traits are always selected.