The animal world and laboratory work 1
Answers are for parents and teachers.
1
Compare an animal cell and a plant cell on three features.
A plant cell has a cellulose wall, plastids and a large vacuole; an animal cell usually does not.
2
How do predators benefit agriculture?
They destroy rodent and insect pests.
3
Write the stages of preparing a mount in order.
Place a drop of liquid on the slide, cover with a cover slip, stain if needed, view under the microscope.
4
Why is work with a hay infusion done under teacher supervision?
Boiling poses a burn risk and hygiene rules must be followed when working with microorganisms.
5
Write two useful roles of animals and one harmful role.
Useful: pollination, improving soil. Harmful: spreading disease (e.g. malaria mosquito).