Which of these describes the structure of the endoplasmic reticulum? A. A system of folded membranes
B. A tiny organelle that has. o membrane.
C. a rigid, protective layer found outside the cell membrane.
D. an organelle surrounded by a double membrane containing dna.

What do scientists need to look at before developing an argument

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.

Drag each tile to the correct box. arrange the phases of mitosis in the correct order. 1 (condensation of chromosomes) 2 (separation of chromosomes) 3 (formation of spindle fibers) 4 (alignment of chromosomes in the center of the cell) 5 (pinching of the cell membrane)