What are the two tiny structures located in the cytoplasm near the nuclear envelope at the beginning of prophase?

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer

What goes in and out of a cell respiration?