Samacheer Kalvi solutions for Biology (Botany) [English] Class 12 TN Board chapter 1 - Asexual and Sexual Reproduction in Plants [Latest edition]

Choose the correct statement from the following

An eminent Indian embryologist is

Identify the correctly matched pair

Pollen tube was discovered by

Size of pollen grain in Myosotis

First cell of male gametophyte in angiosperm is

Match the following

Arrange the layers of another wall from locus to periphery

Identify the incorrect pair

Assertion: Sporopollenin preserves pollen in fossil deposits

Reason: Sporopollenin is resistant to physical and biological decomposition

Choose the correct statement(s) about tenuinucellate ovule

Which of the following represent megagametophyte

In Haplopappus gracilis, number of chromosomes in cells of nucellus is 4. What will be the chromosome number in Primary endosperm cell?

Transmitting tissue is found in

The scar left by funiculus in the seed is

A Plant called X possesses small flower with reduced perianth and versatile anther. The probable agent for pollination would be

Consider the following statement(s)

1. In Protandrous flowers, pistil matures earlier
2. In Protogynous flowers, pistil matures earlier
3. Herkogamy is noticed in unisexual flowers
4. Distyle is present in Primula

Coelorhiza is found in

Parthenocarpic fruits lack

In majority of plants pollen is liberated at

What is reproduction?

Mention the contribution of Hofmeister towards Embryology.

List out two sub-aerial stem modifications with examples.

What is layering?

What are clones?

A detached leaf of Bryophyllum produces new plants. How?

Differentiate Grafting and Layering.

“Tissue culture is the best method for propagating rare and endangered plant species”- Discuss.

Distinguish mound layering and air layering.

Explain the conventional methods adopted in the vegetative propagation of higher plants.

Highlight the milestones from the history of plant embryology.

Discuss the importance of Modern methods in the reproduction of plants.

What is Cantharophily?

List any two strategy adopted by bisexual flowers to prevent self-pollination.

What is endothelium?

‘The endosperm of angiosperm is different from gymnosperm’. Do you agree? Justify your answer.

Define the term Diplospory.

What is polyembryony? How it can commercially exploited.

Why does the zygote divides only after the division of Primary endosperm cell?

What is Mellitophily?

‘Endothecium is associated with dehiscence of anther’ Justify the statement.

List out the functions of the tapetum.

Write a short note on Pollen kitt.

Distinguish tenuinucellate and crassinucellate ovules.

‘Pollination in Gymnosperms is different from Angiosperms’ – Give reasons.

Write a short note on Heterostyly.

Enumerate the characteristic features of Entomophilous flowers.

Discuss the steps involved in Microsporogenesis.

With a suitable diagram explain the structure of an ovule.

Give a concise account of the steps involved in the fertilization of an angiosperm plant.

What is endosperm? Explain the types.

Differentiate the structure of Dicot and Monocot seed.

Give a detailed account of parthenocarpy. Add a note on its significance.