The figure given below shows a small part of the human lung where exchange of gases takes place. In which one of the options given below, the one part A, B, C or D is correctly identified along with its function?
1. | A – Alveolar cavity – main site of exchange of respiratory gases |
2. | D – Capillary wall – exchange of O2 and CO2 takes place here |
3. | B – Red blood cell – transport of CO2 mainly. |
4. | C – Arterial capillary – passes oxygen to tissues |
If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from:
1. epididymis to vas deferens
2. ovary to uterus
3. vagina to uterus
4. testis to epididymis
1. Rhizobium
2. Frankia
3. Anabaena
4. Glomus
1. mangroves
2. tropical rainforests
3. alpine forests
4. temperate forests
1. Type AB
2. Type O
3. Type A
4. Type B
1. Tubectomy
2. Diaphragms
3. IUDs (Intra Uterine Devices)
4. Cervical caps
1. | secondary growth | 2. | disease resistance |
3. | reproduction | 4. | conserving water |
The function of leghemoglobin in the root nodules of legumes is:
1. oxygen removal
2. nodule differentiation
3. expression of nif gene
4. inhibition of nitrogenase activity
1. Heart
2. Kidney
3. Pancreas
4. Brain