USWA ACADEMY JHANG
Paper:
Biology F.Sc(I
I)
Total
Marks: 60 Time: 2:15 min
Q.1: Each question has four possible answers. Select
the correct answer: 10
|
1)
|
Detritus
food chain in comparison to grazing food chain is:
|
(a)generally
longer
|
(b)generally
equal
|
(c)generally shorter
|
(d)none
of these
|
|
2)
|
Total
organic matter in an ecosystem is called:
|
(a)biome
|
(b)biomass
|
(c)food
|
(d)litter
|
|
3)
|
An
example of quantitative trait in man is:
|
(a)hair
colour
|
(b)skin
colour
|
(c)eye colour
|
(d)shape
of nose
|
|
4)
|
The
phenomenon which ignores the independent assortment:
|
(a)segregation
|
(b)crossing
over
|
(c)dominance
|
(d)linkage
|
|
5)
|
All
are related to medulla oblangata ,except:
|
(a)long
term memory
|
(b)breathing
rate
|
(c)heart beat
|
(d)blood
pressure
|
|
6)
|
The
long day plants produce flowers in the presence of phytochrome:
|
(a)p-660
|
(b)p-730
|
(c)both of these
|
(d)none
of these
|
|
7)
|
Between
seminiferous tubules are interstitial cells, which secrete:
|
(a)estrogen
|
(b)progesterone
|
(c)aldosterone
|
(d)testosterone
|
|
8)
|
The
structure in human brain which control hunger is:
|
(a)amygdala
|
(b)hippocampus
|
(c)thalamus
|
(d)hypothalamus
|
|
9)
|
Diploid
parthenogenesis occurs in:
|
(a)wasp
|
(b)bee
|
(c)aphid
|
(d)ant
|
|
10
|
How
many types of receptors are present in skin:
|
(a)3
|
(b)6
|
(c)5
|
(d)2
|
SUBJECTIVE
Q.2: Write short answers of the following
questions? 12x2
= 24
A. Define
the action membrane potenrial. Give its value.
B. What
are neurotransmitters? Give examples.
C. Shortly
explain the habituation.
D. Write
a note on test tube babies.
E. What
is seed dormancy? Give its importance.
F. Shortly
explain the genetal herpes.
G. What
is test cross? Give its use.
H. Compare
the co dominance and incomplete dominance.
I.
What is MOODY?
J.
Define the eutecology and synecology.
K. Define
predation. Give its benefit.
L. Define
xerosere. Give flow chart of its stages.
Long Questions
Q.3: (a) Write a comprehensive note on thyroid
gland. (4)
(b)Explain
the nitrogen cycle by diagram only. (4)
Q.4: (a) Define polygenic
trait. Explain it with an example. (4)
(b)
What is the role of phytochromo in photoperiodism? (4)
Practicals
Q.5: Write
down the procedure to describe the muscle twitch by using frog’ s muscle. (5)
Q.6: Draw
the labeled diagram of fore limb of frog. (5)
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