Euglenas are unicellular organisms. They are both self- feeders (autotrophs) and other-feeders (heterotrophs).
Which statement summarizes the heterotrophic activities of euglenas?
O A. They carry out photosynthesis in sunny places.
B. They are colorless and feed on other, smaller cells.
C. They live in water and have tail-like structures.
OD. They contain chloroplasts with chlorophyll.

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

How many major plates cover the earth