______________ of earth surface is covered with water?

Related Mcqs:

1. Outer surface of bones is covered by a dense layer of connective tissue, called as ___________ ?

   A. Periosteum
   B. Woven bone
   C. Epithelium lining
   D. Connective lining

   Submitted by: Rashid Mehmood

2. The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)

   A. Deffusion
   B. Osmosis
   C. Active transport
   D. None of these

3. Lungs are covered with double layered thin membranous sac called___________?

   A. Disphragm
   B. Pleura
   C. Pericardium
   D. Rib cage

4. In all arthropods,the body is covered with a chittinous cuticle which is secreted by the____________?

   A. Endodermis
   B. Mesophyll
   C. Chitin
   D. Epidermis

5. Stomata cover only ______________ of leaf surface?

   A. 0.03 – 0.04%
   B. 10%
   C. 1-2 %
   D. 50%

6. Which of the following fish drink large amount of sea water and excrete concentrated urine resulting in maximum salt excretion and minimal water loss?

   A. Hagfish
   B. Fresh water fishes
   C. Bony fishes
   D. None of these

7. Mammalian kidney, under restricted water supply can conserve water by over ________ % reabsorption of glomerular filtrate

   A. 80.50%
   B. 90.50%
   C. 95.50%
   D. 99.50%

8. Water potential of pure water is__________?

   A. zero
   B. one
   C. negative
   D. two

   Submitted by: Maryam Aftab

9. In which group of tracheophytes ovules are born on the exposed surface of megasporophylls______________?

   A. Spheospsida
   B. Filicineae
   C. Gymnosperms
   D. Angiosperms

10. There are _________ stomata per square cm of leaf surface in Tobacco plants?

    A. 1200
    B. 12000
    C. 100,000
    D. 1000