Question

question 1
when viewing a specimen through a light microscope, scientists use ______ to distinguish the individual components of cells.
radioactive isotopes
neutral ph
high temperatures
a beam of electrons
special stains

question 2
the ______ is the basic unit of life.
tissue
virus
organism
organ
cell

question 3
prokaryotes depend on ______ to obtain some materials and to get rid of wastes.
diffusion
ribosomes
flagella
isomers
cell division

Explanation:

• Question 1: Special stains are used to distinguish cell components under a light - microscope as they can highlight different structures. Radioactive isotopes are for tracing metabolic pathways, neutral pH doesn't help in distinguishing components, high temperatures can damage specimens, and a beam of electrons is for electron microscopes not light microscopes.
• Question 2: The cell is the basic unit of life. Tissues are groups of cells, viruses are not considered basic units of life on their own as they are acellular, organisms are made up of cells, and organs are made up of tissues which are made of cells.
• Question 3: Prokaryotes depend on diffusion to obtain materials and get rid of wastes. Ribosomes are for protein synthesis, flagella are for movement, isomers are related to molecular structure, and cell division is for reproduction and growth not for material exchange in the context of this question.

Answer:

• Question 1: special stains
• Question 2: cell
• Question 3: diffusion