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Board Maharashtra  State Council of Educational Research and Training
Class Class 12th / HSC
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Stream Science
Subject Biology
Document Type PDF
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Maharashtra HSC Question Bank

Maharashtra  State Council of Educational Research and Training, Pune Class 12th/HSC Biology Question Bank With Answer Key March 2021

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Class & Subjects Question Bank
Class XII Biology
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Maharashtra Class XII Biology Sample Questions

1. The outer layer of pollen grain is thick and made up of complex ,nonbiodegradable substance called as………………….
A. lignin
B. cellulose
C. pectin
D. Sporopollenin

2. Sporoderm is made up of ………….
A. exosporium and endosporium
B. outer integuments and inner integument
C. testa and tegmen
D. exine and intine

3. The number of meiotic and mitotic divisions necessary for development of female gametophyte in angiosperms is…
A. 1 meiosis and 2 mitosis
B. 1 mitosis and 3 meiosis
C. 1 meiosis and 1 mitosis
D. 1 meiosis and 3 mitosis.

4. Identify the odd one with respect to pollinating agent.
A. Baobab
B. Bottle brush
C. Kadamb
D. Sausage

5. In vitro pollen germination and pollen tube elongation can be induced by—–
A. boric acid
B. glucose
C. lactose
D. sucrose

6. Self-incompatibility is found in flowers of plants…..
A. Calotropis
B. maize
C. Thea
D. Gloriosa

7. Porogamy refers to entry of pollen tube through…..
A. integuments
B. chalaza
C. micropyle
D. stigma

8. ……… is an example of helobial endosperm.
A. Adoxa
B. coconut
C. Asphodelus
D. sunflower

9. The single shield shaped cotyledon in monocot seed is known as ……
A. coleoptile
B. scutellum
C. aleurone layer
D. perisperm

10. The example of dicot endospermic seed is ….
A. castor
B. pea
C. mango
D. bean

Single Sentence Answers:
1. Why anther is called as tetrasporangiate structure?
2. At which stage pollen grains are shed from the anther in Angiosperms?
3. What is hilum with respect to ovule?
4. What is protandry?
5. Name any one plant in which double fertilization was discovered?
6. Why fertilization process in angiosperms is called as double fertilization?
7. Which is the most common type of endosperm in angiospermic families?
8. What is the role of suspensor during the development of embryo?
9. What is adventive polyembryony?
10. Name the hormone produced by unfertilised ovary responsible for enlargement of ovary into fruit.

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