2161. Single circuit heart is found in_________?
✅ A. Fishes
Option A: Fishes Option B: Amphibians Option C: Reptiles Option D: Mammals Correct Answer : Fishes Read more
Author: Sheeraz Ahmed – Page 109
2162. Stomata open due to _________ of K+ into the guard cells from the surrounding epidermis
✅ B. Active transport
Option A: Diffusion Option B: Active transport Option C: Osmosis Option D: All of these Correct Answer : Active transport Read more
2163. Which of the following is true about hearts of earthworm?
✅ C. They are present lateral to the oesophagus.
Option A: There are 5-7 pairs of heart. Option B: They are present between 1-7th segments. Option C: They are present lateral to the oesophagus. Option D: They pump blood from ventral to dorsal vessel. Correct Answer : They are present lateral to the oesophagus. Read more
2164. Transport of minerals from soil to epidermal cells of roots via carrier protein molcules along their concentration gradient is called___________?
✅ B. Facilitated diffusion.
Option A: Diffusion. Option B: Facilitated diffusion. Option C: Passive transport. Option D: Active transport. Correct Answer : Facilitated diffusion. Read more
2165. Pulling upward of water and dissolved minerals towards the leaves through the xylem tissue is called__________?
✅ A. Transpiration pull
Option A: Transpiration pull Option B: Root pressure Option C: Ascent of sap. Option D: All of these Correct Answer : Transpiration pull Read more
2166. A pressure created by active secretion of salts and other solutes from other cells into xylem sap is called___________?
✅ B. Root pressure
Option A: Transpiration pull Option B: Root pressure Option C: Osmotic pressur Option D: None of these Correct Answer : Root pressure Read more
2167. Stomatal transpiration is __________ of total transpiration
✅ A. 90%
Option A: 90% Option B: 91% Option C: 93% Option D: 95% Correct Answer : 90% Read more
2168. ___________ function as multisensory hydraulic valve?
✅ B. Guard cells
Option A: Lenticels Option B: Guard cells Option C: Hydathods Option D: All of these Correct Answer : Guard cells Read more
2169. _________ give rise to macrophages, which destroy larger particles by phagocytosis.
✅ C. Monocyte
Option A: Nautrophils Option B: Basophila Option C: Monocyte Option D: Lymphocyte Correct Answer : Monocyte Read more
2170. Aerating openings formed in the bark through which exchange of gases takes place and water is lost in the form of vapours are___________?
✅ C. Lenticels
Option A: Hydathods Option B: Stomata Option C: Lenticels Option D: None of these Correct Answer : Lenticels Read more