In examining a picture of a cell taken with an electron microscope, a student observes that the cell has a nucleus and a cell membrane, but not a cell wall. The student can correctly conclude that the cell probably comes from: A. an animal
B. a fungus
C. a seaweed
D. a plant

This is a coral reef ecosystem. many biotic and abiotic factors affect the health of this ecosystem. which set correctly pairs a biotic factor and an abiotic factor?

Asap what occurs after cytokinesis is completed at the end of meiosis 1?

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?