The right option is; dark-field microscope
A light microscope that makes the specimen appear light on a dark background is called a dark field microscope.
Dark field microscopes are light microscopes that are used in different ways to clearly view various specimens that are unstained, transparent, and hard to see using a light field unit. Dark field microscopes are very effective because they show the details of unstained and live samples. It is also very simple to use, and inexpensive to set up.
They are semi-permeable because they can diffuse and pass through the plasma membrane easily.
Three reasons for cell division are:
.Growth
. Cell Replacement
. Regeneration
. Asexual Reproduction
Really really really small
Answer: Transport proteins act as doors to the cell, helping certain molecules pass back and forth across the plasma membrane, which surrounds every living cell. In passive transport molecules move from an area of high concentration to an area of low concentration.
