Getting to Know Plants

Q17. What are the functions of the petals and sepals in flowers?

Ans. Function of Petals – Bright color of petals helps in pollination by attracting insects such as butterflies and bees to the flower.

Function of Sepals – It protects the developing flower from any harm. 

Q18. Why are leaves of few plants modified into tendrils? Give examples.

Ans. In weak- stemmed plants, leaf or a part of leaf gets modified into green threadlike structures called tendrils which help in climbing around the support. Example: pea plant

Q19. Why is it difficult to separate the sprouted young plants from the cotton wool?

Ans. Roots fix the plant firmly in the soil. In case of sprouted young plants, the roots grown fix the seeds in cotton wool and thus make it difficult to separate these from cotton wool.

Q20. What are trees? Give two examples of trees.

Ans. Some plants are very tall and have hard and thick brown stem. The stems have branches in the upper part, much above the ground. Such plants are called trees.

Examples: Mango tree, Neem tree, Peepal tree etc.

Q21. Explain through an activity that stems conduct water.

Ans. Pour some water in a glass. Add a few drops of red ink to the water. Cut the base of the stem of the herb. Now put it in the glass. We will observe that some parts of the herb appear red. This shows that stem conduct water.    

Q22. What are weeds? Why farmers remove them from their field?

Ans. Weeds are unwanted plants that grow along with the crops and compete with normal healthy plants for water, light, soil nutrients and space.

Farmers remove them from their field because they compete with the crop growing in the field.

Q23. What are the two types of leaf venation present in leaves? Write one example of each type of venation.

Ans. The two types of leaf venation present in leaves are reticulate venation and parallel venation.

Example of Reticulate venation – coriander, rose, tulsi, maple, and oak

Example of Parallel venation - aloe vera, coconut, banana, lily, maize, grass, and wheat

Q24. Differentiate between creepers and climbers.

Ans.

Q25. What are the two types of root systems? Explain each of them with examples.

Ans. The two types of root systems are tap root system and fibrous root system.

Tap root system: There is one main root called tap root from which smaller roots sprout laterally called lateral roots. Examples: Beetroot, Carrot, Sugar beet, Dandelion etc.

Fibrous root system: In this root system, roots are thin and of more or less equal length growing from the stem. Examples: wheat, maize, rice etc.

Q26. Differentiate between herbs and shrubs.

Ans.