9. What are the extra embryonic membranes present in reptiles?
10. Cockroach can live without a head. How?
11. What is meant by total lung capacity?
12. What are cortical nephrons?
13. What are the functions of cerebellum?
14. What is meant by metahaline culture?
Answers
Explanation:
9. The thin protective membranes formed on the periphery of the embryo in amniotes (reptiles, birds and mammals) are known as extraembryonic membranes. There are four main types namely amnion, yolk sac, allantois, and chorion.
10. A cockroach can live for a week without its head. Due to their open circulatory system, and the fact that they breathe through little holes in each of their body segments, they are not dependent on the mouth or head to breathe. The roach only dies because without a mouth, it can't drink water and dies of thirst.
11. Total lung capacity (TLC) is the amount of air the lung can contain at the height of maximum inspiratory effort. ... Residual volume (RV) is the amount of air remaining within the lung after maximum exhalation.
12. Cortical nephrons (the majority of nephrons) start high in the cortex and have a short loop of Henle which does not penetrate deeply into the medulla. Cortical nephrons can be subdivided into superficial cortical nephrons and midcortical nephrons.
13. The cerebellum receives information from the sensory systems, the spinal cord, and other parts of the brain and then regulates motor movements. The cerebellum coordinates voluntary movements such as posture, balance, coordination, and speech, resulting in smooth and balanced muscular activity.
14. Aquaculture is a branch of science that deals with the farming of aquatic organisms such as fish, molluscs, crustaceans and aquatic plants. ... They are (a) Freshwater aquaculture (b) Brackish water aquaculture (c) Marine water aquaculture. Culturing of fishes is called fish culture or pisciculture.
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