Plants and Nature - Page 2

Leaves need oxygen and carbon-dioxide (for photosynthesis). How do they get these gases?

Leaves take in these gases from atmosphere through small pores present on them called stomata.

What do you mean by a complete and incomplete flower?

The flower with all whorls, i.e., sepals, petals, stamen and carpel in it is a complete flower. If any one of this is absent...

Why does white flowers bloom at night?

White colour attracts night insects for pollination.

Why are petals colourful?

The colourful petals attract insects for pollination.

Why do we see dew drops on leaves in the early morning?

At night the water lost by leaves does not get evaporated and gets collected on the leaves in the form of dew drops.

Name a plant that has underground as well as aerial (above the ground) root system.

Banyan tree.

Pitcher plant has green leaves which can prepare food by photosynthesis then why does it eat insects?

To get nitrogenous compounds which it cannot absorb from the soil.

Name a plant that eats insect.

Pitcher plant.

What are unisexual and bisexual flowers?

Unisexual flower has either male (stamen) or female (pistil) parts.Bisexual flowers have both male and female whorl in the flowers, i.e., they have both...

Explain the main functions of leaf.

There are following two main functions of leaf:(i) Transpiration: The extra water comes out of the leaves in the form of vapour. This process is called...

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