Cell size, shape and number — task. Science CBSE Homework Assignments, Class 9.

Read out the given sentences and choose the correct one.

1.

For motility, sperms have tail. And eggs are spherical shape to accommodate maximum nutrients.
For motility, sperms have cilia. And eggs shaped like a branch of the tree to accommodate maximum nutrients.

2.

The root hair cells have shortened areas which also help to decrease surface area to volume ratio.
The root hair cells have prolonged areas which also help to increase surface area to volume ratio.

3.

In human, we have approximately 37.2 million cells; each of these cells varies in shapes and sizes.
In human, we have approximately 37.2 trillion cells; each of these cells varies in shapes and sizes.

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