NEW
Font size
Worksheetscells and microorganisms
Total questions: 23
Worksheet time: 12mins
Which type of magnifying instrument is most likely used to see an image of a cell?
Magnifying glass
Telescope
Microscope
Hand Lens
Scientists use microscopes to examine cells. Why is a microscope needed to view cells?
to separate cells from each other
to make cells look smaller than they are
to make cells look bigger than they are
to hold cells still so they can be seen
Which scientist invented one of the earliest microscopes?
Galileo
Albert Einstein
Robert Hooke
Robert Brown
Animals and plants can be classified into separate groups. Which characteristic below can identify a cell as an animal cell?
multicellular
vertebrate
movement
reproduction
What are groups of cells called?
cells
celloid
tissues
cell membranes
What is the job of chloroplasts?
to store all of the important information (DNA) that the cell needs.
holds all parts of the cell in their place
changes sunlight into chemical energy
separates plant cell from the outside environment
Unicellular organisms each have a nucleus, mitochondria, cytoplasm, and a cell membrane. Unicellular organisms are lifeforms that are
ten cells or less
one cell
cells that hold together tissues
100 or fewer cells
Both plant and animal cells have
a cell membrane, a cell wall, and a nucleus
cytoplasm, vacuoles, and chloroplasts
a cell membrane, a nucleus, and cytoplasm
cytoplasm, chloroplasts, and a cell membrane
What part of the cell that contains the majority of the cell’s genetic material?
nucleus
cell membrane
golgi apparatus
mitochondria
Which conclusion about the cell type is supported by the cell parts in the drawing?
The presence of a nucleus and cytoplasm would indicate this is an animal cell.
The presence of chloroplasts and a cell wall would indicate this is a plant cell.
The presence of chloroplasts and a nucleus would indicate this is an animal cell.
The presence of a cell membrane and a nucleus would indicate this is a plant cell.
A biologist discovers a new multicellular organism. The biologist is not sure if it is a plant or an animal. She decides to look at the cells under a microscope. Which structure world best indicate that the organism is a plant?
Cytoplasm
Membrane
Nucleus
Cell wall
Animal cells do not have
cytoplasm
a nucleus
a cell membrane
chloroplasts
Plant cells are not round like animal cells because plant cells have
cytoplasm
a nucleus
cell membrane
chloroplasts
Which of the following are beneficial microorganisms?
All of the above are beneficial microorganisms
Bacteria that break down environmental pollutants (i.e. oil spills, soil and water pollution)
Antibiotics used to treat infections
Microflora in the human digestive system
The normal bacteria found in your digestive tract
There is no bacteria in the human digestive tract.
are constantly being killed by your stomach acids.
are harmful to you.
helps you digest food.
Would it be good for your health to kill all of the bacteria in your body?
No.The harmful bacteria in your body are important for stimulating the immune system.
Yes. Getting rid of all bacteria in the body would prevent most diseases. This is why doctors prescribe antibiotics.
No. Many bacteria in your body are beneficial. These beneficial bacteria help our body perform functions such as digestion
Yes. Most bacteria in your body are harmful. Killing all of the bacteria would get rid of these bacteria.
Some strains of E. Coli are harmful to humans because
it can be spread by a sneeze or cough.
it is a fungus.
it can cause food poisoning/digestive problems.
it is a bacteria.
Which of the following are harmful microorganisms that can cause a sore throat?
E. Coli
Streptococcus (strep)
Salmonella
Microflora in the human gut
Which of the following can be caused by a microorganism?
Paper cut
Broken finger
Sprained wrist
Strep throat
Which of these microorganisms is considered harmful?
Mold on fruit
Yeast in bread
Bacteria in yogurt
Fungus used to make antibiotics
Are fungi helpful or harmful?
They are neither helpful or harmful
They are both helpful and harmful.
They are harmful.
They are helpful.
When we forget to wash our hands, or don’t wash them properly, we are doing which of the following?
Spreading neither beneficial nor harmful microbes to other people.
Not washing our hands will not spread disease or germs to other people.
Spreading harmful microbes to other people or giving them to ourselves by touching our eyes, mouths, noses, or cuts in our bodies.
Spreading beneficial microbes to other people, or giving them to ourselves by touching our eyes, mouths, noses, or cuts in our bodies.
Protists can be harmful to humans. How do protists enter the human body?
They come from infected fluid in the eye.
They enter the skin while we are swimming.
Through an insect bite.
We breathe them into our lungs.
