11th Standard Syllabus & Materials

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TN 11th Tamil இயற்கை வேளாண்மை,சுற்றுச்சூழல் -செய்யுள் - மனோன்மணீயம் Important Questions And Answers Study Material - QB365 Set A

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TN 11th Tamil மொழி கலை -செய்யுள் - ஒவ்வொரு புல்லையும் Important Questions And Answers Study Material - QB365 Set A

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11th Standard Botany - Plant Kingdom Two Marks Question

Published on: 19/09/2019

Botany - Plant Kingdom

Download Tamil Nadu 11th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

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Std: 11th Standard - Biology

chapter: - Model Question paper

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Questions:

Generic 2

15 x 2 = 30

Mention any three uses of Pteridophyte.

Mention any two vegetative reproduction in algae.

What is Epiphytic algae? Give Examples.

What is unique about the endosperm of Gymnosperms?

How does fertilization occur in gymnosperms?

What is Taxol ?

What are phycocolloids?

Name the green algae used as biofuel.

Give examples of vegetative propagation in Bryophytes.

10.

Name the different reserve food materials in algae.

11.

Name a foliaceous alga and colonial non motile alga.

12.

Name the methods of asexual reproduction seen in algae.

13.

Mention two characters shared by gymnosperms and angiosperms.

14.

What do you infer from the term pycnoxylic?

15.

What is plectostele? Give example.

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Answers Key:

Generic 2

15 x 2 = 30

Cut flower arrangements, Food, Biofertilizer.

Vegetative reproduction includes fission in unicellular forms the cell divides mitotically to, produce two daughter cells. eg. Chlamydomonas.
Fragmentation: fragments of parent thallus grow into new individual. eg. Ulothrix.

A few algae grow on the surface of aquatic plants and are called epiphytic algae. Eg: Coleochaete, and Rhodymenia.

1. It is haploid and develops before fertilization.
2. In Angiosperms it is triploid and develops after fertilization.

Fertilization is of siphonogamous type, i.e., the male gametes are carried to the archegonia through pollen tube in gymnosperms.

Drug obtained from a gymnosperm - Taxus brevifolia and used for cancer treatment

Algae like Kappaphycus alvarezii , Gracilaria edulis and Gelidiella acerosa are grown commercially in the sea for harvesting phycocolloids got from cell wall of algae.

Botryococcus braunii