Question

Name 3 differences between a dissecting microscope and a compound microscope. If we were

studying a cross-section of a plant cell, which microscope should we use? Why? If we wanted to

study a ladybug, which Microscope would we use? Why?

We are made of hundreds of thousands of cells. What process creates somatic cells? What
happens if the cell cycle isn’t regulated and why does this occurs? What process creates
gametes? Why do gametes have half the number of chromosomes compare to somatic cells?

Answer 1

	Dissecting microscope	Light microscope
Number of lenses	single occular lens	two, occular and objective lenses
Magnification and resolution	less	high in comparision to dissecting microscope
Use	used to see surface features of specimens	used to see cross sections of specimen

2. For cross section, we will use light microscope and for ladybug we will use dissecting microscope.

This is because higher magnification and resolution is obtained in light microscope which is required for the observation of cross section.

And the surface feature can be easily seen with the help of dissecting microscope and hence we can use this for visualising ladybug.

3. Mitosis helps in the creation of millions of cells in a multicellular organism. If this is not regulated, then uncontrolled division of cell which is called as cancer is caused.

4. Meiosis

Gametes have half the number of chromosomes as compared to the parent cell because two gametes fertilize to form a diploid zygote and the chromosome number is restored in the zygote. If gametes would not have half the number of chromosomes, then zygote would have Double the number of chromosomes are compared to an adult organism.

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