Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Sperms have a tail, whereas eggs do not. Why?

List any two characters of pea plants used by Mendel in his experiments other than height of the plant and the colour of the seed.

Expand MMR and IMR.

Briefly describe the following:
Transcription.

What makes the Nucleopolyhedrovirus a desirable biological control agent?

Which of the following diseases can be diagnosed by analysing the karyotype? Haemophilia, Turner's syndrome, Phenylketonuria.

What is said to be the connection made by embryo to the mother's womb?

Name any two species of fungus, which are used in the production of the antibiotics.

What type of interaction is shown by a sparrow eating the seeds?

Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Assertion: Biopatents are awarded for biological entities and all products derived from them.
Reason: Patent on use of turmeric in wound healing was cancelled in 2008.