Science (English Medium) Class 11 - CBSE Question Bank Solutions for Biology

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

Cucumber

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

Pumpkins

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

Grapevine

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

Watermelons

Tendrils of grapevines are homologous to the tendril of pumpkins but are analogous to that of pea. Justify the above statement.

Describe various stem modifications associated with food storage, climbing and protection.

Stolon, offset and rhizome are different forms of stem modifications. How can these modified forms of stem be distinguished from each other?

Seeds of some plants germinate immediately after shedding from the plants while in other plants they require a period of rest before germination. The later phenomena is called as dormancy. Give the reasons for seed dormancy and some methods to break it.

Match the followings and choose the correct option from below

Cells of this tissue are living and show angular wall thickening. They also provide mechanical support. The tissue is ______.

In which of the following pairs of parts of a flowering plant is epidermis absent?

Why are neurons called excitable cells? Mention special features of the membrane of the neuron?

Match the element with its associated functions/roles and choose the correct option among given below

Plants can be grown in ______. (Tick the incorrect option)

Plants with zinc deficiency show reduced biosynthesis of ______.

Yellowish edges appear in leaves deficient in ______ mineral.

Excess of Mn in soil leads to defeciency of Ca, Mg and Fe. Explain.

How is sulphur important for plants? Name the aminoacids in which it is present.

In which part of alimentary canal does absorption of water, simple sugars and alcohol takes place?

Correct the statement given below by the right option shown in the bracket against them.

Absorption of amino acids and glycerol takes place in the. (small intestine/ large intestine)