Living/
Nonliving
Nonliving
What is the basic unit of life?
A cell
What instrument helps scientists see objects too small for the naked eye?
A microscope
What does magnification help you do?
Make an object appear larger
What surrounds the cell and controls what enters and leaves?
The cell membrane.
Are humans made of plant cells or animal cells?
Animal cells
Name three characteristics of living things.
need food, need water, reproduce, respond to the environment, need a suitable environment, have cells, exchange gases, eliminates waste
What part of the microscope do you look through?
The eyepiece
If the objective is 4X, what is the total magnification?
40X
What is the jelly-like material inside a cell called?
Cytoplasm
What structure gives plant cells extra support and protection?
The cell wall
What is an individual living thing called?
An organism
What part of the microscope holds the slide in place?
The stage clips
If the objective is 40X, what is the total magnification?
400X
What structure contains the genetic information in most plant and animal cells?
The nucleus
What is the difference between unicellular and multicellular organisms?
Unicellular organisms have one cell; multicellular organisms have many cells
Why is a seed considered living even when it is not growing?
It contains a living embryo that can grow under the right conditions.
What part of the microscope controls how much light passes through the specimen?
The diaphragm
What happens to the field of view as magnification increases?
It gets smaller
What structures in plant cells capture sunlight to make food?
Chloroplasts
Name two structures found in plant cells but not animal cells.
Cell wall and chloroplasts
A car uses energy and moves. Why is it not considered alive?
It does not have cells and cannot grow or reproduce as a living organism.
What should you use first when focusing on a specimen?
The lowest-power objective lens
An object appears to move left when you move the slide right. Which direction should you move the slide to make the image move right?
Left
How does the cell wall help a plant cell survive, and what might happen to the cell without it?
The cell wall provides support, protection, and shape. Without it, the cell would be weaker and could lose its structure.
Why can a single-celled organism survive on its own while one human body cell cannot?
A single-celled organism performs all necessary life functions, while a human body cell depends on other cells and body systems.