RAWALPINDI BOARD 2016
PAPER BIOLOGY PART-II
Time: 20 M. (Objective Part) Marks: 17
Note: You have four choice for each objective type question as A, B, C and D. The choice which you think is correct; fill that circle in front of that question number. Use marker or pen to fill the circles. Cutting or filling two or more circles will result in zero mark in that question.

Question#1

• The protection of internal environment from the harms of the fluctuation in external environment is termed as:
  
  (a) Osmoregulation
  (b) Thermoregulation
  (c) Excretion
  (d) Homeostasis
  
  
• Animals of the group of flat worms have simple tubular excrertory system calles as:
  
  (a) Kidney
  (b) Nephron
  (c) Nephridian
  (d) Protonephridium
  
  
• Seven vertebrae which lie in the neck region is called:
  
  (a) Lumber region
  (b) Thoracic region
  (c) Pelvic region
  (d) Cervical region
  
  
• The joint that allows the movements in two directions is called:
  
  (a) Cartilaginous joints
  (b) Synovial joints
  (c) Hinge joints
  (d) Ball and socket joint
  
  
• The processes conducting impulses away from the cell body are called:
  
  (a) Dendrites
  (b) Dendron
  (c) Nissls granules
  (d) Axon
  
  
• The end or complete stop of the menstrual cycle is called:
  
  (a) Menupause
  (b) Emotional stress
  (c) Mal nourishment effect of cycle
  (d) Menstruation
  
  
• The animals that lay shelled eggs to protect the developing embryo from harsh terrestrial conditions are called:
  
  (a) Oviparous
  (b) Viviparous
  (c) Ovoviviparous
  (d) Egg laying mammals
  
  
• Immediately after fertilization, the egg undergoes a series ofmitotic divisions called:
  
  (a) Morulla
  (b) Gastrulation
  (c) Cleavage
  (d) Blastulla
  
  
• DNA was discovered in:
  
  (a) 1869
  (b) 1864
  (c) 1961 
  (d) 1971
  
  
• The period of life cycle of cell between two consecutive divisions is termed as:
  
  (a) Resting Phase
  (b) Inter Phase
  (c) G 1 Phase
  (d) G2 Phase
  
  
• Synapses takes place in:
  
  (a) Leptotene
  (b) Zygotene
  (c) Pachytene
  (d) Anaphase
  
  
• Any group of inter breeding organisms of the same species that exist together in both time and space is called:
  
  (a) Genepool
  (b) Population
  (c) True breeders
  (d) Multiple alleles
  
  
• Green colorblindness is called:
  
  (a) Protonopia
  (b) Deuteronopia
  (c) Tritanopia
  (d) Protanomalous
  
  
• Alfred Wallace developed a theory of natural essentially identical to:
  
  (a) Linnaeu's
  (b) Darwin's
  (c) Lamark's
  (d) Mendel's
  
  
• Is Sindh the desert ecosystem is called:
  
  (a) Thar
  (b) Thai
  (c) Sahara
  (d) Gobi
  
  
• The animal that is caught and eaten is called:
  
  (a) Predator
  (b) Prey
  (c) Host
  (d) Parasite 
  
  
• Ozone Molecule is made up by bindig of three atoms of:
  
  (a) Nitrogen
  (b) Hydrogen
  (c) Oxygen
  (d) Carbon

Time: 3:10 hours
(Subjective Part) )
Marks: 83
Section I

2. Attempt any EIGHT short questions. (8 x 2 = 16)

• Define Homeostasis.
• Describe the structure of a flame cell.
• What are juxtamedullary nephrons?
• Differentiate between Heart wood and Sap wood.
• What is rickets and what is its cause?
• Differentiate between Fibro cartilage and hyaline c artilage.
• Define embryonic induction.
• Differentiate between vascular and cork cambium.
• What is chromosomal non-disjunction?
• What is interphase? Write the names of its substages
• What is theory of special creation?
• Define Hardy Weinberg theorem.

3. Attempt any EIGHT short questions. (8 x 2 = 16)

• Sketch and label sensory neuron.
• Define nerve impulse.
• Give role of human gut as endocrine tissue.
• What are fraternal twins?
• Write a note on test tube babies.
• Differentiate between menstrual cycle and oestrous cycle.
• What is prob? Give its role.
• Define hybridization.
• Give biological name of Rhesus monkey.
• Give productivity in sub humid tropical grass land.
• How can you conserve energy?
• Name two Air pollution and give their harmful effec ts.

4. Attempt any SIX short questions. (6 x 2 = 12)

• What is meant by promoter?
• What is Genetic code?
• What do you know about point mutation?
• Differentiate between Gene and Allele.
• What is Hydrosene and Xerosene?
• What is Nullo Gamete?
• What do you know about the term Ecosystem?
• Differentiate between habitat and ecological niche.
• What do you know about protanopia and tritanopia?

SECTION-II

Attempt any THREE questions. (8x3=24)
Question#5
(a) Discuss the structure and function of Nephron.
(b) Highlight the importance of forests.

Question#6
(a) Explain sliding filament model of muscle contraction.
(b) Write down the main points of theory of natural selection.

Question#7
(a) Discuss working of sensory receptors with special reference to skin.
(b) Explain food web with diagram.

Question#8
(a) Define Photoperiodism. Give classification of plants according to photo periodic requirements for flowering.
(b) Explain Meselson-Stahl experiment.

Question#9
(a) What is growth? Discuss different phases of growth.
(b) What is incomplete dominance? Explain with the help of an example.

SECTION-III

Attempt any THREE questions . (5x3=15).

• Sketch and label the nervaous system of cockroach.
• Draw and label different bones of fore-limb of frog.
• Write down procedure to demonstrate phenomenon of geotropism.
• Investigate the water content of soil sample.
• Write the short answer of the following questions.
• What are amphibious kind of hydrophytes?
• Define muscle.
• What are the glands with ducts are known as?
• Why is the egg-shell porous?
• What is meant by balanced ecosystem?