Showing posts with label Assignment. Show all posts
Showing posts with label Assignment. Show all posts
4 Feb 2014
Class 10 Home Assignment Chapter : Our Environment
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1. Define biodegradable wastes. (1 mark)
2. Define decomposers. Name one decomposer. (1 mark)
3. Which of the following belong to the same trophic level?
Tree, Frog, Snake, Grass, Lizard. (1 mark)
4. Name the group of chemical compounds which damages the ozone layer. (1mark)
5. What would happen if all the decomposers were eliminated from the Earth? Explain with
reasons. (2 marks)
6. Give an example of a food chain operating in fresh water pond. Mention the food habit of
each trohic level
in
this food chain. (2 marks)
7. Consider the food chain: Grass à Deer à Lion.
What will happen, if lions are removed from the above food chain? (2 marks)
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Class 9 Home Assignment Chapter : Natural Resources
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1. Biotic components of biosphere is
not
constituted by –
(a) Producers (b) Consumers (c) decomposer (d) air
2. Major source of
mineral in soil is
the –
(a) Parent rock
from which soil is
covered (b) Plants
(c)
animals (d)
bacteria
3. One of the following factors does not lead to soil
formation in nature
(a) the sun (b)
water (c) wind (d) polythene bags
4. The nitrogen molecules present in air can be converted into nitrates and nitrites by –
a) a biological process of nitrogen fixing bacteria present in soil b)
a biological process of carbon fixing factor present in soil
c) any of the industries manufacturing nitrogenous compounds.
d) The plants used as cereal crops in field
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21 Dec 2013
20 Dec 2013
23 Nov 2013
11 Jul 2012
Assignment BIO XI 1.3.1
BIO XI 1.3
CHAPTER: PLANT KINGDOM
KEY TERMS:
Numerical Taxonomy, Phylogenetic, cytotaxonomy, Chemotaxonomy, SCP, Haplontic, Diplontic, Gametophyte, Sporophyte, Cone, Strobilus, Sporophyll, Protonema, Heterospory , Prothallus, Archegonium, Antheridium, Isogamy, anisogamy, Oogamy, Hetrosporous, Seed, Flower, Fruit, Monocot, Dicot, Doublr fertilisation, embryo sac, Antipodals, Synergids, Nucellus, Endosperm. Mycorrhiza, Coralloid roots,
BIO XI 1.3.1
Q. 1 What are three types of systems of classification of Angiosperms? Discuss their basis, advantages and limitations with atleast one example of each.
Q. 2. Define the following:
(a) Numerical Taxonomy
(b) Cytotaxonomy
(c) Chemotaxonomy
Q. 3 Differentiate the three sub groups of algae in tabular form on the basis of photosynthetic pigments, stored food Cel wall content, flagella and habitat.
Q. 4 Name any two sources of agar. Write any two of its uses.
Q. 5. What are single cell proteins (SCP). Name any two algae which are its sources.
BIO XI 1.3.2
Q. 1 Enlist the common characteristics of bryophytes. Name the three sub groups of bryophytes with examples.
Q.2. Draw life cycle of a moss showing sporophyte and gametophyte?
Q. 3 What is protonema? Name any two plants in which it is found?
Q. 4 Write any two point importance of bryophytes?
Q. 5 Define the terms:
(a) Gametophyte
(b) Sporophyte
(c) Sporophyll
BIO XI 1.3.3
Q. 1 Enlist the most important characters of Pteridophytes? ( Min. five)
Q. 2 Why pteridophytes are called first land plants?
Q. 3 Name the four subgroups in which pteridophytes are classified. Give any two examples of each.
Q. 4 What do you understand by heterospory? What is its importance in the plant world.
Q. 5 With the help of a digram/ flow chart show life history of a typical fern plant.
Q. 6 Name the plant which is called walking fern.
BIO XI 1.3.4
Q. 1 write any five major features of gymnosperms.
Q. 2 Diagrammatically show life cycle of pinus.
Q. 3 Write any five point economic importance of gymnosperms.
Q. 4 What are coralloid roots. Why these are important?
Q. 5 Define the trems : flower, fruit and seed.
Q. 6 What is the major character on the basis of which angiosperms are classified. Name its two sub groups.
Q. 7 Differentiate between Dicots and monocots on the basis of Seed, leaf, stem, root and flower.
BIO XI 1.3.5
Q. 1 Female gamete in angiosperms is a haploid 7 celled 8 nucleated structure. What is the name of this structure? Name the different types of cells present in it.
Q. 2 Name both the processes which take place simultaneously during double fertilisation. what are the structures produced from them?
Q. 3 What do you mean by alternation of generation?
Q. 4 Withe the help of labeled diagrams show three types of life cycle found in plant kingdom basd on alternation of generation. Give two examples of each type.
Q. 5 Name an alga which is diplontic.
COMPETITION POINT
Q. What is economic importance of algae.
Q. Name the member of green algae which which causes a plant disease named Red Rust of Tea.
Q. Name plants;
Walking fern
Fossil tree
Shisham
Teak ( Sangwan)
Source of cork
source of Pencil wood
( sandal wood)
Q. Who discovered double fertilisation?
Q. What is growing trees for timber known as?
Q. Write the sources and uses of: Carrageen Algin Agar
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