Question

Class 9 - BIOLOGY
WORKSHEET
1) Distinguish between nuclear region of bacterial cell and
that of animal cell.
2) Distinguish between Prokaryotic cell and eukaryotic cell.
3) Name the tissue that makes husk of coconut. List in
characteristics.
4) Differentiate between bone and cartilage.
5) Explain Varietal improvement.
6) What is hybridization ? Explain its types
7) Give merits and demerits of fish culture. What do you
understand by composite fish culture ?
8) Distinguish between Annelids and Arthopods.
9) List the characteristic features of Chordates.
10) List the characteristics of phylum Nematoda.
11) What is the needs for Scientific naming organisms?
List four conventions that are followed while writing
scientific names.
12) How is being healthy different from being disease
free? Explain
13) What are vectors? Name the vectors of malaria and
Kalaazar.
14) Discuss the role of atmosphere in climate control,
movement of air and occurrence of rains.
15) How do fossil fuels cause air pollution?
plsss answer these ​

Answer 1

1)BACTERIAL CELL:

*They have avoid membrane.

*They have free RNA and Nucleic acid called nucloid.

ANIMAL CELL :

*They have well developed nuclear membrane.

*They have well developed nucleus called also nucleus.

2)PROKARYOTIC CELL:

*They have no nucleus or not well developed nucleus.

* They have 70s ribosome

EUKARYOTIC CELL:

*They have well developed nucleus .

*They have 80s nucleus.

3). Sclerenchyma.....

Characteristics of sclerenchyma:

* It is non living.

*It is hard, rigid..

4) ANS IS IN ATTACHED PIC

5)ANS IS IN PIC

6) HYBRIDIZATION is a process of combining different variety and species of organism which is genetically dissimilar to create a hybrid...

IT'S TYPE. :

*.Interventional hybridization :

Two variety of same spices.

.

*Interspecific hybridization:

Two spices of same genus

*Intergeneric hybridization:

Between two genus hybridization.

7) MERITS OF FISH CULTURE:

*Fish can obtained in less price.

* Fish can be obtained of good quality and quantity.

DEMERITS OF FISH CULTURE:

*The dilevery timing of all fish r same so fish eggs destroyed.

COMPOSITE FISH FARMING:

It is process of raising four or five types of fish in a single pond.

8)ANNILEDA:

*They are also called ring worm

*They have closed circulatory system .

ARTHOPODAS:

*They have jointed legs.

*They have open circulatory system.

9) The main characteristics of phylum chordata is that they have Notochord.

10) Following r the characteristics of phylum NEMATODA:

*They have circular , cylindrical body.

*They are bilateral symmetrical.

*They have pseudocoelom.

*They are unisexual.

*They r free living , parasitic , and aquatic.

11) The most important need of scientific naming organism is that in medical colleges students or sintist belongs to different different countries , For easy to the understand the languages of each other , there is spoken synthetic names of organism.

THE FOUR CONVENTION THAT FOLLOW WHILE WRITING SCIENTIFIC NAMES ARE:

* First we write genus then spices name.

*The first letter of genus is capital letter and the first letter of spices is small letter

*When printed, the scientific name is given in italics.

*When printed by hand the genus name and rhe sources name have to be underlined separately.

12) Being healthy is the state of physical , mental , and social well beingness while Being disease free means absence of dis comfort in any part of our body. A healthy person can be disease free person also but a disease free person may be healthy or unhealthy.

13) The animals or microbes that carry the agent or microbes of disease is called VECTORS.

Vector of malaria = Female Anopheles Mosquito.

Vector of Kala - azar= Liesmania.

14) ROLE OF ATMOSPHERE IN CLIMATE CONTROLL:

To make an average temperature on Earth.

ROLE OF ATMOSPHERE IN MOVEMENT OF AIR:

In day time air moves from sea to land and in Night time air moves from land to sea bcoz of atmosphere.

ROLE OF ATMOSPHERE IN OCCURENCE OF RAIN:

Bcoz of atmosphere rain occurs.In another words Atmosphere make rains.

15) When we burn fossils fuel a large amount of Co2 comes from it that is harmful for all biotic and abiotic components of atmosphere and mix in air.In this way fossils fuels causes air pollution..........

HOPE IT HELPS ......

.

Answer 2

Answer:

1) In nuclear region of bacterial cell Their is absence of nuclear membrane hence they are called prokaryotes. In nuclear region of animal cell nuclear membrane is present hence they are eukaryotes.

2The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not. The nucleus is where eukaryotes store their genetic information. ... Prokaryotes, on the other hand, have no membrane-bound organelles.

Sclerenchyma

The tissue which makes up the husk of the coconut is “Sclerenchyma”.