Photosynthetic protists include phytoplankton, red algae, and brown algae. What is the key role of these protists in aquatic environments?

A. They form the base of the aquatic food web.
B. They help larger organisms digest food.
C. They remove excess sodium from water.
D. They consume cyanobacteria.

Which best describes the structure of dna?

Invasive species are one of the major threats to biodiversity. these species multiply quickly and compete with native species for food, sunlight, spac and other resources. on the map, determine the area where native species will have limited resources available to them due to invasion threat from invasive species threat very low low medium high very high

Cells destroy body cells infected by a virus or bacteria.