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

Define:  Actinomorphic symmetry

Explain the Rivet Popper hypothesis.

Define the Amniocentesis.

The following question(s)/statement(s) has four suggested answers. Choose the correct option in the following case.

Meselson and Stahl’s experiment proved: _________.

Describe K⁺ transport stomatal mechanism.

Draw a neat labelled diagram of L.S. of anatropous ovule.

Differentiate between the following :

Spermatogenesis and oogenesis

A homozygous pea plant with round seed coat and yellow cotyledons are crossed with another homozygous, pea plant having wrinkled seed coat and green cotyledons.
(i) Give the types of gametes produced by plants of F-generation.

(ii) Give the dihybrid phenotypic ratio with the corresponding phenotypes.

(iii) State Mendel’s principle involved in this cross.

Expand the following abbreviation: IUCD

Name the scientist who has contributed to the following: Reverse transcription

Define and give the role of amniocentesis.

Mention three features of the Neanderthal Man.

Give an account of Lederberg’s replica plating experiment to show the genetic basis of evolution.

Mention one cause for variation in nature.

Discuss the role of cambium in the secondary growth of dicot stems.

Explain the chemiosmotic hypothesis for ATP synthesis.

Draw a neat labelled diagram of the vertical section of a monocot leaf.

What is Integrated Pest Management?

Sonora – 64 is a variety of ______.

Assertion: PAN is a secondary pollutant.

Reason: The secondary pollutants are produced by the combination of primary emitted pollutants in the atmosphere.