Science (English Medium) कक्षा ११ - CBSE Question Bank Solutions

Endosperm, a product of double fertilization in angiosperms is absent in the seeds of ______.

Reticulate and parallel venation are characteristic of ______ and ______ respectively.

Draw diagrams of a typical monocot and dicot leaves to show their venation pattern.

Reticulate venation is found in dicot leaves while in monocot leaves venation is of parallel type. Mention one exception to this generalization.

You have heard about several insectivorous plants that feed on insects. Nepenthes or the pitcher plant is one such example, which usually grows in shallow water or in marsh lands. What part of the plant is modified into a ‘pitcher’? How does this modification help the plant for food even though it can photosynthesize like any other green plant?

Tendrils are found in the following plants. Identify whether they are stem tendrils or leaf tendrils.

Peas

Differentiate between pulvinus and petiole

Which one of the following cell types always divides by anticlinal cell division?

The lawn grass (Cynodon dactylon) needs to be mowed frequently to prevent its overgrowth. Which tissue is responsible for its rapid growth?

A muscle fibre tapers at both ends and does not show striations. Name the muscle fibre.

A homopolymer has only one type of building block called monomer repeated ‘n’ number of times. A heteropolymer has more than one type of monomer. Proteins are heteropolymers usually made of ______.

Glycogen is a homopolymer made of ______.

The number of ‘ends’ in a glycogen molecule would be ______.

Starch, Cellulose, Glycogen, Chitin are polysaccharides found among the following. Choose the correct answer:

Cotton fibre ______

Starch, Cellulose, Glycogen, Chitin are polysaccharides found among the following. Choose the correct answer:

Exoskeleton of cockroach ______

Starch, Cellulose, Glycogen, Chitin are polysaccharides found among the following. Choose the correct answer:

Liver ______

Starch, Cellulose, Glycogen, Chitin are polysaccharides found among the following. Choose the correct answer:

Peeled potato ______

Which one of the following roles is not characteristic of an essential element?

Name a plant, which accumulate silicon.

Mycorrhiza is a mutualistic association. How do the organisms involved in this association benefit from each other?