Structural Organisation in Animals, Worksheet Class 11 Chapter 7

 

Name: ______________________ Roll no. _____, Class 11 Biology, Chapter 7

A          Fill in the blanks.                                                                                   17

1.      Three types of cell junctions are found in the ________ and other tissues. These are called ___________, _________ and _________.

2.      Cartilage, bone, blood and adipose tissue are specialized ________ tissue.

3.      _________ is a fluid tissue with _________ functions.

4.      _________ tissue is a reservoir of stored food.

5.      Skeletal muscle is the muscle tissue attached to ___________.

6.      _________________ muscle is a component of internal organs.

7.      ________________ are the basic units of nervous tissue.

8.      Endocrine glands secrete mucus, ________, earwax, _______, milk, ________ etc.

9.      The bone cells are also called _______; and they are present in the spaces called _________.

10.  Full form of PCT is ______________________________________________.

 B         Match Columns A and B                                                                          4

A	B
1.      Neuroglea	a)      Adipose tissue
2.      Collagen fibres	b)      Nervous tissue
3.      Fat	c)      Connective tissue
4.      Platelets	d)      Blood

 

C          What are the cellular components of blood?                                           2

            __________________________________________________________________

            _________________________________________________________________

            __________________________________________________________________

            __________________________________________________________________

 

D          Describe various types of epithelial tissues with the help of labeled diagrams.   2

 

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Morphology of Flowering Plants, 11 Worksheet 5

 Name: ____________________ Roll no. __________, Class 11 Biology, Chapter 5

A          Fill in the blanks.                                                                                             5

1.      The swollen end of the stalk or pedicel is called ___________ or _____________.

2.      When a flower can be divided into two equal radial halves in any radial plane passing through the centre, it is said to be ______________; or else it said to be ______________.

3.      When calyx and corolla are undifferentiated, it is called ___________.

 B         Match Columns A and B                                                                                8

A	B
1.      Syncarpous	a)      Sterile stamen
2.      Staminode	b)      Carpels fused
3.      Polysepalous	c)      Sepals united
4.      Polyandrous	d)      Stamens attached to petals
5.      Gamosepalous	e)      Carpels free
6.      Epipetalous	f)       Sepals free
7.      Apocarpous	g)      Stamens in two bundles
8.      Diadelphous	h)      Stamens free

 

C          Name any two types of aestivation in corolla: ______, _______      2

D          Write the floral formula of Solanaceae: _______________               2

E          Write the floral formula of Liliaceae: _______________                   2

F          Name three fruits which are berries: _________________________ 3

G          Name a plant which has six tepals: ______________                         1

H          Name a fruit which has marginal placentation: ______                       1

I           Draw the floral diagrams of Solanaceae and Liliaceae:                         6

Solanaceae

Liliaceae

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Uses of Algae

Hello!

Algae that we see in water bodies is actually very useful to human beings and animals. Do you know some of their uses? 

Let's see some of them here:

1. Algae, in form of sea weeds, are used as source of food, e.g., Porphyra, Ulva, Laminaria, etc.

2. Algae are used to produce commercial products like agar agar, a jelly like substance Eg Gelidium, Gracilaria etc. Agar agar is also used as culture media in biotechnology laboratory. 

3. Algae are also useful for producing medicines. Antibiotics are produced from certain algae. 

4. Algae like Nostoc, Anabaena etc. are used as manure or living manure; because they can convert atmospheric nitrogen into nitrogenous compounds. 

5. Algae like Chlorella, Chlamydomonas, etc. are used in purification of sewage or ponds; because they help in bacterial decomposition by providing oxygen. 

6. Algae like Chlorella, Synecoccus, etc are used in space travels; because they provide oxygen and absorb carbon dioxide. 

7. Algae like Laminaria, Fucus, Ascophyllum etc. are used to extract iodine; and Polysiphonia, Rhodymenia are used to extract bromine. 

Can you add some more points here? 

Plant Kingdom

Hello, Readers! 

Let's have a look at the Plant Kingdom. 

Plant kingdom includes algae, bryophytes, pteridophytes, gymnosperms anda angiosperms 

ALGAE

Algae reproduce vegetatively by

fragmentation, asexually by formation of different types of spores and sexually by formation of gametes.

Depending on the type of pigment 

and stored food, algae are classified into three classes, namely Chlorophyceae, Phaeophyceae and Rhodophyceae.

Eg: Green algae (i) Volvox (ii) Chlamydomonas (iii) Chara

Brown algae (i) Laminaria (ii) Fucus (iii) Dictyota

Red algae (i) Porphyra (ii) Polysiphonia

BRYOPHYTES

Bryophytes are plants that live on land but are dependent on water for

sexual reproduction. Their body is more differentiated than that of algae. 

They possess root-like, leaf-like and stem-like structures.

The bryophytes are divided into liverworts and mosses. 

Eg: Liverworts – Marchantia, Riccia

Mosses – (c) Funaria, Sphagnum

PTERIDOPHYTES

In pteridophytes, the main plant is a sporophyte which is differentiated into true root, stem and leaves. These organs possess well-differentiated vascular tissues The sporophytes bear sporangia which produce spores. The spores germinate to form gametophytes. The gametophytes bear male and female sex organs called antheridia and archegonia, respectively. 

Eg: Ferns, Seleginela 

GYMNOSPERMS 

The gymnosperms are the plants in which ovules are not enclosed by any

ovary wall. After fertilisation the seeds remain exposed and therefore these plants are called naked-seeded plants. The gymnosperms produce microspores and megaspores which are produced in microsporangia and megasporangia borne on the sporophylls. 

Eg: Cycas, Pines 

ANGIOSPERMS

In angiosperms, the male sex organs (stamen) and female sex organs (pistil) are borne in a flower.  One male gamete fuses with egg cell

(syngamy) and other fuses with diploid secondary nucleus (triple fusion). This phenomenon of two fusions is called double fertilisation and is found only in angiosperms. The angiosperms are divided into two classes – the dicotyledons and the monocotyledons.

Eg: Peas, Rose, Neem tree etc

       Wheat, Maize, Bajra etc