Plant Kingdom - Class 11 Medical Biology - Extra Questions

What is the use of needle line leaves and sloped branches to Pinus?



Penetration power is maximum of violet light. $$B-phycoerythrin$$ is only pigment to absorb violet light. Due to phycoerythrin, red algae is deepest algae.



The heterosporous species, the female gametophyte remains on the parent sporophytes for variable periods.



Rewrite the following scientific names correctly. Ficus religiousa(peepal), zea Mays(maize) and Bombyx Mori(silk moth).



Name the algae which show diplontic alternation of life cycle?



Write the difference between monocot and dicot plants.



Complete the sentence by filling in the blank and explain those statement.
(Angiosperms, Gymnosperms, Spore, Bryophyta, Thallophyta, Zygote)

In pteridophytes, asexual reproduction occurs by _____ formation and sexual reproduction occurs by _____ formation.



Why is double fertilization not observed in gymnosperms despite them being seeded plants?



Arrange the following events of life cycle of bryophytes in correct sequence :-
I. Germination of spore
II. Gametes formation
III. Formation of Gametophyte
IV. Fertilization
V. Embryo formation



How is double fertilization significant to angiosperms and how has this event led to the successful evolution of angiosperms?



Differentiate Between Cycas and Mango trees.



Differentiate between algae and fungi.



Find out what do the terms algal bloom and red-tides signify.



Define Pteridophyta



The gell -forming substance called agar is extracted from _______ algae.



Thallophytes, bryophytes and, pteridophytes are included in 'cryptogams', whereas gymnosperms and angiosperms are 'phanerogams'. Why?



Why is Euglena called a plant-animal?



Name the different pigments found in algae



Name the largest kelp?



Write a note on economic importance of algae?



State the uses of algae.



Why is Eichhornia crassipes nicknamed as "Terror of Bengal"?



Write the name of the organism that is referred to as the 'Terror of Bengal'.




Why do algae and fungi shift to sexual mode of reproduction just before the onset of adverse conditions?



Collect information about sea weeds, sea kelp from your school library and write a note with examples.



While observing a micro-organism under an electron microscope, there is a confusion between two students as to whether it is a bacterium or a diatom. Help them to overcome their confusion.



Pteridophytes are vascular cryptogams. Why?



Name the three main classes of Bryophyta.



What are the salient features of Pteridophytes?



How is Sphagnum used in nursery?



What is agar-agar?



_________ is the red colour pigment found in algae.



Algae are not associated with diseases unlike many fungi and bacteria. What is the reason for this?



Define protonema stage?



Under what conditions algae enter the palmella stage?



Distinguish between :
(a) Gametophyte and sporophyte
(b) Megasporophyll and microsporophyll
(c) Antheridia and archegonia
(d) Liverworts and mosses



Name the following :
The organisms that can be called natural purifiers of the air.



How do bryophytes differ from pteridophytes?



Short / Long answer type questions .
Define entropy. Discuss its significance to the biological systems.



Very short answer type.
Observe the relationship between the first two words and then fill in the fourth place
angiosperms : roots , rhodophyta : _________



Very short answer type.
Mention any one character in which algae differ from bryophytes



Define angiosperms.



How can we consider green algae similar to plant world?



Give the biological names of any two useful and two harmful algae.



Describe the economic importance of algae with suitable examples. (any five)



Name the food stored in the members of Chlorophyceae.



Name an algae which is a good source of protein.



What is the function of holdfast in a algae?



Give the salient features of Bryophyta with two examples.



Name the four classes of pteridophyta with one example?



Differentiate between red algae and brown algae?



GroupPhotosynthetic pigmentsReserve food
ChlorophyceaeChl a, bStarch
PhaeophyceaeChl a, c & fucoxanthaninB
RhodophyceaeDFloridean starch
Write missing appropriate term.



Give information about reproduction of gymnosperms?



Select the mismatched pair:

(a) Cycas   -    Living Fossils
(b) Thuja   -    Agar production
(c) Pinus      -   Resin, turpentine production
(d) Araucaria -  Ornamental plant



Enlist the general characteristics of organisms of pteridophytes with example. 



Define Bryophyta.



Define Thallophyta



How is the presence of cyanobacteria in paddy fields beneficial to rice crop?



How many of the following features are similar between Cyas and Pinus?
(a) Branched stem
(b) Needle like leaves
(c) Presence of archegonium
(d) Dioecious condition
(e) Sulphur shower
(f) Reduced male gametophyte









Write botanical name and family of Castor plant.



Describe the process of double fertilisation in angiosperms.



Pteridophyta do not have which of the following?
A. Root
B. Stem
C., Flower
D.Leaves



______ are called as amphibians of the plant kingdom.



What do hard wood and soft wood stand for? 



Who am I?

I am green, but don't have organs.



Make a list of algae and fungi that have commercial value as source of food, chemicals, medicines and fodder. 



Short Answer.

Why are bryophytes called the amphibians of the plant kingdom ?



Why are the plants of division Pteridophyta called Cryptogams?



Short Answer.
Each plant or group of plants has some phylogenetic significance in relation to evolution: Cycas, one of the few living members of gymnosperms is called the 'relic of the past'. Can you establish a phylogenetic relationship of Cycas with any other group of plants that justifies the above statement? 



What is the differentiating characteristic of Angiosperm?



Food is stored as Floridean starch in Rhodophyceae. Mannitol is the reserve food material of which group of algae?



Biological classification is a dynamic and ever evolving phenomenon which keeps changing with our understanding of life forms. Justify the statement taking any two examples. 



What is the principle underlying the use of cyanobacteria in agricultural fields for crop improvement?



 Distinguish between Bryophyta and Pteridophyta. 



Match the columns:
(A) a-2,b-4, c-3,d-1
(B) a-3,b -1, c -4, d-2
(C)a-3,b-4,c-2,d-1
 (D)a-4,b-3,c-1, d-2



Differentiate between the following: 
(i) Red algae and brown algae
(ii) Liverworts and moss
(iii) Homosporous and heterosporous pteridophyte
(iv) Syngamy and triple fusion



Match the following (column I with column II).
Column I
 Column II
 (a) Chlamydomonas (i) Moss
 (b) Cycas  (ii) Pteridophyta
 (c) Selaginella  (iii) Algae
 (d) Sphagnum (iv) Gymnosperm



Observe the relationship between the first two words and then fill in the fourth place
(a) Angiosperms : roots :: Rhodophyta : .......... 
(b) Fern: prothallus :: moss : 
..........
(c) Moss : capsule :: fern : ..........
(d) Angiosperms: flowers :: conifers : ..........



Define (a) Photic Region (b) Phycocolloids (c) Kelps (d) Moss (e) Ovule.



Cycas resembles with ferns in having..........vernation



Which of the following acellular  organisms are not classified by Whittaker?
Mucor, Aspergillus, Trypansoma, Euglena, Paramecium, Mycoplasma, Liverworts, Viroids, Ulothrix, Lichens, Viruses 



Coralloid root help Cycas in?



Class 11 Medical Biology Extra Questions