Biology
Bahawlpur
(PART II) 2014
PART -1
(Objective Type ) 
Marks : 17Note: Four possible choices A,B,C,D to each question are given. Which choice is correct , fill that circle in front of that question number. Use marker or pen to fill the circles. Cutting two or more circles will result in zero mark in that question.

Question#1

• Activation of Sweat Glands to produce Sweat for evaporative cooling is a type of adaptation:
  
  (a) Structural
  (b) Physiological
  (c) Behavioural
  (d) None of these
  
  
• Mature bone cells are called :
  
  (a) Osteocytes
  (b) Osteoclasts
  (c) Chondrocytes
  (d) Blastocytes
  
  
• Muscles present in the Gut Wall are :
  
  (a) Osteocytes
  (b) Osteoclasts
  (c) Chondrocytes
  (d) Blastocytes
  
  
• Nephridia are the excretory structuresa present in:
  
  (a) Hydra
  (b) Planaria
  (c) Cockroach
  (d) Earthworm
  
  
• The palnt hormone which inhibits growth and promotes seed and bud dormancy is:
  
  (a) Auxin
  (b) Gibberellins
  (c) Cytokinins
  (d) Abscisic Acid
  
  
• For maximum growth, optimum temperature is:
  
  (a) 0---35^O C
  (b) 5---10 ^O  C
  (c) 25---30 ^O C
  (d) 35---40 ^O C
  
  
• In tomato and peppers ,parthenocarpy is artificiaaly induced by adding :
  
  (a) Auxins
  (b) Cytokins
  (c) Abscisic acid
  (d) Ethene
  
  
• The hormone which controls the development of male secondary sexual characteristics during puberty is :
  
  (a) Insuline
  (b) Tetosterone
  (c) Oestrogen
  (d) Progesteron
  
  
• Which strand of DNA is transcribed :
  
  (a) Coding
  (b) Sense
  (c) Template
  (d) Both strands
  
  
• The position of gene on chromosome is called :
  
  (a) Habitat
  (b) Locus
  (c) Allele
  (d) Focus
  
  
• The actual reduction division is :
  
  (a) Meiosis-I
  (b) Meiosis-II
  (c) Mitosis
  (d) Cytokinesis
  
  
• Programmed and organized death of cell is known as :
  
  (a) Necrosis
  (b) Apoptosis
  (c) Cyclosis
  (d) Chlorosis
  
  
• Cases of disputed parenthood can be solved with the help of :
  
  (a) DNA Finger printing
  (b) RNA Finger Printing
  (c) Cloning
  (d) Gene Sequencing
  
  
• The Grass lands having no woody plants are also known as :
  
  (a) Prairies
  (b) Sawana
  (c) Alpine
  (d) Boreal
  
  
• Diseases in living organisms which are caused by parasites are termed as :
  
  (a) Infections
  (b) Infestations
  (c) Parasitism
  (d) Succession
  
  
• A respiratory protein which is present in all aerobic organisms is :
  
  (a) Haemoglobin
  (b) Myglobin
  (c) Cytochrome a
  (d) Cytochrome c
  
  
• About 95% of our daily energy requirements are fulfilled by :
  
  (a) Nuclear Energy
  (b) Hydroelectric Power
  (c) Geothermal Energy
  (d) Fossil fuels

Subjective
Part 1

Question#1

• Explain the term Homeostasis. Give the role of contractile Vacuole
• Briefly explain Hematoma Formation. What are Aerofoils?
• What are the characteristics of Smooth Muscles?
• Differentiate between Tratology and Teratogens.
• Why interphase is called Resting Phase? Give the importance of Meiosis .
• Name any four factors affecting Cone Frequency .
• Differentiate between Homologous and Analogous Organs.
• Explain Endosymbiont Hypothesis.
• How the most plants have adapted to survive in heat stress?

Question#1

• What is Neuroglia? Give its role. Give application of Synthetic Auxins.
• Briefly describe Vernalization. How test tube babies are produced?
• What is the cause and effect of Syphilis? What are Biofilters?
• Define plankton and give its types. Define soil and give its main components
• Compare Symphathetic and Parasympathetic Nervous system.
• Defne palindromic Sequences and Sticky Ends.
• Write Flora and Fauna of Tundra Ecosystem.
• Differentiate between Deforestation and Aforestation.
• Differentiate between Leading and Lagging Strands. Define translation
• What are Multiples Alleles? What is Epistasis?
• What is “One Gene One Polypetide” Hypothesis?
• Differentiate between Autosomes and Sex Chromosomes .
• Define Parasitism and give at least one example.
• Differentiate between Autecology and Synecology .

 Part –II

Question#5
(a) Explain working of Nephron in Human Kidney. 4
(b) Write a note on Green House Effect. 4

Question#6
(a) Write a note on joints. 4
(b) What are endangered Species? What measures could be adopted for their preservation? 4

Question#7
(a) Compare Nervous System in Planeria and Hydra. 4
(b) Describe Nitrogren Cycle as it occurs in Nature. 4

Question#8
(a) Write a note on” Fruit set and Fruit Ripening” 4
(b) Explain briefly “Watson and Crick’s Model of DNA ” 4

Question#9
(a) Write a brief note on Abnormal Development. 4
(b) Describe incomplete Dominance. 4

Part –III
(Practical Part )

Question#10 (5*3=15)
(a) Sketch and label the female reproductive system of Frog. 5
(b) Sketch and label the diagram of Pelvic Girdle of Frog. 5
(c) Write an experiment to study the Phenomenon of Geotropism. 5
(d) Construct a food chain and food web (Flow Chart) of pond Ecosystem. 5
(e) Write a short answers of the followings: 5
(i) Define Positive Geotropism and Negative Geotropism.
(ii) What happens to chromosome number when a cdell divides by Mitosis?
(iii) What are continuous variations ? Give examples from Humans.
(iv) What is Ganglion? What are Decomposers?