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501. Which of the following are considered to be the simplest living organisms with the ability to manufacture their own food by photosynthesis?
(a) Diatoms
(b) Bacteria
(c) Green plants
(d) Blue-green algae
The Answer is: (d) Blue-green algae
502. Bryophytes are:
(a) Vascular plants
(b) Non-vascular plants
The Answer is: (b) Non-vascular plants
503. The forests in Pakistan comprising of which one of the following are facing the danger of extinction:
(a) Pinus
(b) Cedrus
(c) Junipers
(d) Abies
The Answer is: (c) Junipers
504. During photosynthesis, green plants build up:
(a) Carbohydrates
(b) Proteins
(c) Fats
(d) All these
The Answer is: (a) Carbohydrates
505. Pollens are produced in larger numbers and are light in weight in flowers pollinated by:
(a) Wind
(b) Water
(c) Insects
(d) All these
The Answer is: (a) Wind
506. Photosynthesis is a biochemical process for the transfer of solar energy to:
(a) Nitrogen cycle
(b) Hydraulic cycle
(c) Petrological cycle
(d) Food chain
The Answer is: (d) Food chain
507. Ginger is an example of:
(a) Tuber
(b) Rhizome
(c) Bulb
(d) Corm
The Answer is: (b) Rhizome
508. The earliest organisms that appeared on the surface of the earth were probably:
(a) Autotrophs
(b) Symbionts
(c) Heterotrophs
(d) None of the above
The Answer is: (c) Heterotrophs
509. Osmosis is a function of which of the following factors?
(a) The number of solute molecules in solutions on the two sides of the selectively permeable membrane
(b) Pressure
(c) Temperature
(d) All of the above
The Answer is: (d) All of the above
510. Which of the following micronutrients is involved in photosynthesis?
(a) Manganese
(b) Molybdenum
(c) Copper
(d) Zinc
The Answer is: (a) Manganese
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