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HE PRESENT TENSE : ITS FORMS
REVISIONAL EXERCISES
(Present Tense)
Exercise 1. Tell the name of the tense of each sentence and change it to
present continuous tense :
1. We bathe in the river.
2. I have known everything about you.
3. Swallows do not fly to cold lands in summer.
4. Do you help your friends in trouble ?
5. The labourers have not dug the foundation.
6. Does she not walk gracefully ?
7. Mr Winkle does not work regularly.
8. Do the farmers reap the ripe harvest ?
9. The slave has pulled the thorn out of the lion's paw.
10. The birds have flown to their nests.
Answers
Answer:
Because animals are heterotrops, they can not produce their own food. Animals depend upon plants as the plants are the producers of the food becase they are autotrophs i.e. they can produce their own food. Answer: Because animals are heterotrops, they can not produce their own food.Filtration eliminates both large compounds and small, dangerous contaminants that cause diseases with a simple and quick filtration process.. Since filtration does not deplete all the mineral salts, water that has been filtered is considered healthier compared to water purified using other methods.The dispersal of seeds by wind is called as anemochory. For anemochory, the seeds should be lightweight and should have some morphological features as wings, hairs, etc.
Madar and cotton seeds do not show presence of wings.
As stated above, seeds should be lightweight as well as should possess some morphological features for anemochory. Madar and cotton seeds show a dense coating of hairs around their testa. It enables the seeds to float in air.
Therefore, the correct answer is option D.
Electromeric effect refers to a molecular polarizability effect occurring by an intramolecular electron displacement characterized by the substitution of one electron pair for another within the same atomic octet of electrons.