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

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.

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?

Name the macronutrient which is a component of all organic compounds but is not obtained from soil.

What are essential elements for plants? Give the criteria of essentiality? How are minerals classifieds depending upon the amount in which they are needed by the plants?

With the help of examples describe the classification of essential elements based on the function they perform.

Which of the following exhibits the highest rate of respiration?

When does anaerobic respiration occur in man and yeast?

The product of glycolysis (under hypoxia) in skeletal muscle and anaerobic fermentation in yeast are respectively ______ and ______.

A process is occurring throughout the day, in ‘X’ organism. Cells are participating in this process. During this process ATP, CO₂ and water are evolved. It is not a light dependent process.

1. Name the process.
2. Is it a catabolic or an anabolic process?
3. What could be the raw material of this process?

Mark the right statement among the following

The food mixes thoroughly with the acidic gastric juice of the stomach by the churning movements of its muscular wall. What do we call the food then?