ISC (Science) ISC Class 12 - CISCE Question Bank Solutions for Biology (Theory)

What is cryopreservation?

Briefly discuss any two methods by which plants avoid self-pollination.

Name the pollinating agent of a flowering plant with large and coloured flowers with sticky stigma. State one characteristic feature of the pollen grains produced in such flowers.

Mention one significant difference between Parenchyma and Sclerenchyma.

Mention one significant difference between Symplastic movement and apoplastic movement

In the following questions/statements has four suggested answers. Rewrite the correct answer

Roots and shoots lengthen through the activity of:

(A) Apical meristem

(B) Vascular Cambium

(C) Lateral meristem

(D) Cork Cambium

In the following questions/statements has four suggested answers. Rewrite the correct answer

Opening and closing of stomata is due to:

(A) Ca²⁺

(B) Na⁺

(C) K⁺

(D) Cl–

Give three anatomical differences between a monocot root and a dicot root

Explain the transpiration pull theory for an ascent of sap

Why are xylem and phloem classified as complex tissues?

Describe the structure of phloem.

Give one significant contribution of the given scientists:

P. Maheshwari

Describe the tissue culture technique in plants.

What is a clone?

List any four applications of tissue culture.

Give one significant difference between :

ECG and EEG

What do you mean by Biochemical Oxygen Demand (BOD)?

Give four adaptations in flowers pollinated by insects.

What is adaptive radiation?

Answer the following question:

Why do Green plants start evolving CO₂ instead of O₂, at high temperatures?