7. Why is gas exchange mone difficuit for sqvaric animals wish gls than for anim

Question

7. Why is gas exchange mone difficuit for sqvaric animals wish gls than for animalis with lungs? A Water is denser than air. B. Water contalns much less Oy than air per unit volume. C Gills have less surface area than lungs. D. Only A and B are correct E. A,B,and C are correct. The Bohr shift on the axygen-hemoglobin dissocilation curve is produced by changes A The partial pressure of oxygen. B. The partial pressure of carbon monoxide E pH 69 Fetlization in the earthworm is accomplished by the use of the A nephridia B. clitellium C. lame cells D. trachea E typhosole the correct order of noral organs from thn outside to the Inside of a Which of the following complete fower? 70. D) sepals-petals-stamens-carpels ale ga 71. An adult human's red blood cells are formed in the Aj bone marrow 8) spleen. C) thoracic cavity D) liver. E) abdominal cavity.

Explanation / Answer

67. Option B is correct answer , reason is in comparision to oxygen that is present in the atmosphere , water contains much less oxygen per unit volume so exchange is difficult in comparision to air .

68. option E , association of O2 and dissociation of the Oxygen from the blood will result in the change in PH , carbonic anhydrase will help in this process

69. Clitellum will play a role in fertilization of earth worm , it is a sac like structure in which eggs are deposited.

70. D is correct , sepal , petal , stamen , carpels.

sepal is the outer most whrol , inner to sepal petals are present which represent second whrol , third whrol is stamens and fourth whrol is carpels,

71. Bone marrow . In adults bone marrow will produce RBC.

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