Biodiversity
Q1. How does
deforestation lead to desertification?
Ans: Deforestation leads to desertification due to
the following reasons:
i.
It
decreases the water in the soil.
ii.
It
decreases the humidity.
iii.
It
lessens the formation of clouds.
iv.
Soil
becomes free from the hold of roots and leads to erosion.
Q2.Why is it
important for biologists to understand biological classification?
Ans: To know about:
i.
The
variety of organism
ii.
Their
evolution
iii.
Their
generic relationship
iv.
The
number of species
v.
Similarities
and differences among organism
It is important for a biologist to
understand their classification.
Q3. What is the
status of viruses in classification?
Ans: Viruses are neither plants nor animals.
Sometimes they are considered a living organism, while sometimes they behave like
non-living. So, they are excluded from the five-kingdom classification and
considered to be on the borderline of living and non-living things.
Q4. How can you
differentiate between kingdom Monera and Protista?
Ans: Some differences between kingdom
Monera and Protista are:
i.
Monerians
are prokaryotes while Protistians are eukaryotes.
ii.
Nuclear
envelop is absent in Monera but present Protista.
iii.
Cell
wall is made of Murine in Monera but is various in Protista.
iv.
Monarians
are autotrophic but Protstians are heterotrophic.
Q5. List down the
endangered species of Pakistan and what are the reasons behind their population
decrease?
Ans: Some endangered mammals:
i.
Markhor:
(Capra falconeri)
ii.
Snow
Leopard
iii.
Musk
Deer
iv.
Asian
Black Bear
v.
Wild
Goat
vi.
Fishing
Cat
Some endangered birds:
i.
Indian
Vulture
ii.
Siberian
Crane
iii.
Black
Headed Ibis
Some endangered plants:
i.
Yew
ii.
Chalghoza
iii.
Sanobar
Reasons behind the decrease in population
are deforestation, overhunting, rapid industrialization, expansion of cities.
Q6. Write down
the biological names of some local plants and animals.
Ans: a. Plants:
i.
Shishum
Dalbergia
sisso
ii.
Mulbery
Morus
alba
iii.
Melia Melia
azederak
iv.
Fig
Ficus carica
v.
Grapes
Vitus
venefera
vi.
Rose
Rosa
indica
vii.
Eucalyptus Eucalyptus
grandis
b. Animals:
i. Cat Felis
domestica
ii. Hen Gallus domesticus
iii.
Cow Bos taurus
iv.
Buffalo Bufalus
babalis
v.
Dog Canis lupus
familaris
vi.
Lion Panthera leo
vii.
Sheep Ovis aries
