Differentiate Artery and vein
Differentiate Artery and vein
Life Processes
The heart
The heart The heart is a muscular organ as big as our fists. Because oxygen and carbon dioxide have to be transported by the blood, the heart has different chambers to prevent the oxygen-rich blood from mixing with the blood containing carbon dioxide. The carbon dioxide-rich blood has to reach the lungs for the carbon …
What is Blood pressure? What is the normal blood pressure of a human being? What is an instrument to measure Blood Pressure?
Solution Blood pressure Definition The force that blood exerts against the wall of a vessel is called blood pressure. This pressure is much greater in arteries than in veins. The pressure of blood inside the artery during ventricular systole (contraction) is called systolic pressure and pressure in the artery during ventricular diastole (relaxation) is called …
Q. How do pneumatophores work?
Solution : Pneumatophores Plants that grow in salty environments have unique roots known as on. These are roots with many pores on their surface that are arising from the water’s surface
Q. What are the uses of fermentation?
Solution : Fermentation is a commercially important process. It is following processes:i. Curing of tea leaves, tobacco, etc.ii. Manufacture of vinegar,iii. an industrially important compound, the Creation of yoghurt, pickles, bread, and other bakery and culinary products.iv. Production of alcoholic biofuels and other beverages such as beer, wine, liquors, and ethyl alcohol.v. Tanning of leather.vi …
Q.(a) takes place in yeast during fermentation , (b) takes place in the presence of oxygen , (c) produces only energy in the muscles of human beings , (d) produces ethanol, oxygen and energy. (2020)
Solution : (a) takes place in yeast during fermentation
Q.(a) State the form in which the following are stored:(i) Unused carbohydrates in plants.(ii) The energy derived from food in humans,(b) Describe the process of nutrition in Amoeba with the help of diagram. (Board Term I, 2016)
Solution : (a) ( i ) Unused carbohydrates are stored in plants as starch, a complex sugar. When energy is required, they are later converted into simple sugars (glucose). (ii) The molecules of the food that are absorbed contain energy in their chemical bonds. Oxidation in the cell releases the bond energy between them. To create …
Q.(a) What is peristaltic movement? (b) ‘Stomata remain closed in desert plants during daytime’. How do they do photosynthesis? (Board Term I, 2013)
Solution : (a) Peristaltic movement is the relaxing of the gut muscles to move the partially digested food throughout the alimentary canal downward. (b) The stomata of desert plants open at night to absorb carbon dioxide (CO2). To stop water loss through transpiration, stomata are closed during the day. To continue photosynthesis during the day, …
Q. How does gaseous exchange take place in the leaves?
Solution : The stomata, or openings in the leaves, are typically found on the lower surface of the leaves. Gases and water vapour easily diffuse in and out through the stomata. The oxygen enters the leaf cells by diffusing through the stomata.Similarly, the stomata allow the carbon dioxide that the leaf cells produce to escape.
Q. Which part of a plant is involved in the gaseous exchange?
Solution : Gaseous exchange occurs throughout the entire plant, including the general surface of the roots, lenticels in the stem, and stomata on the leaves.