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12th Biology Weekly Test - 1 ( Botany - Asexual and Sexual Reproduction in Plants )

St. Britto Hr. Sec. School - Madurai

12th Biology Weekly Test - 1 ( Botany - Asexual and Sexual Reproduction in Plants )-Aug 2020

Time : 1.30 Hours

Part - A

Multiple Choice Question - Answer All Question

An eminent Indian embryologist is

S.R.Kashyap
P.Maheswari
M.S. Swaminathan
K.C.Mehta

Identify the incorrect pair

sporopollenin - exine of pollen grain
tapetum – nutritive tissue for developing microspores
Nucellus – nutritive tissue for developing embryo
obturator – directs the pollen tube into micropyle

Assertion : Sporopollenin preserves pollen in fossil deposits
Reason : Sporopollenin is resistant to physical and biological decomposition

assertion is true; reason is false
assertion is false; reason is true
Both Assertion and reason are not true
Both Assertion and reason are true.

Identify the correctly matched pair

Tuber - Allium Cepa
Sucker - Pistia
Rhizome - Musa
Stolon - Zingiber

First cell of male gametophyte in angiosperm is

Microspore
Megapore
Nucleus
Primary Endosperm Nucleus

Choose the correct statement(s) about tenuinucellate ovule

Sporogenous cell is hypodermal
Ovules have fairly large nucellus
sporogenous cell is epidermal
ovules have single layer of nucellus tissue

Megaspore arises from ___________

Integument
Nucellus
Placenta
Raphe

In majority of plants pollen is liberated at

1 celled stage
2 celled stage
3 celled stage
4 celled stage

Pollen tube was discovered by

J. G. Kolreuter
G. B. Amici
E. Strasburger
E. Hanning

Arrange the layers of anther wall from locus to periphery

Epidermis, middle layers, tapetum, endothecium.
Tapetum, middle layers, epidermis, endothecium.
Endothecium, epidermis, middle layers, tapetum.
Tapetum, middle layers endothecium, epidermis.

Part - B

Generic 2 - Answer All Question

Define pollination.

What is hilum?
What is a stock?

What are germ pores?

What is carrot grass?

What is reproduction?

Part - C

Generic 3 - Answer All Question

'The endosperm of angiosperm is different from gymnosperm. Do you agree. Justify your answer.

“Endothecium is associated with dehiscence of anther” Justify the statement
Give an account of endothecium of anther wall.

What is sporopollenin?

What is sporophytic budding?

What is Ornithophily?

Part - D

Generic 5 - Answer All Question

Write short note on Heterostyly.

Enumerate the characteristic features of Entomophilous flowers.

Give a detailed account on parthenocarpy. Add a note on its significance.
Discuss the steps involved in Microsporogenesis

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