Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans? The size of the multicellular organisms is very large compare to unicellular organisms. Diffusion is a passive mode of transport of substances and can transfer gases up to a very small distance only. What criteria do we use to decide whether something is alive? The main criteria to check for life, is the sign of breathing and respiration. If there is no sign of breathing or respirations then the given organism is not alive.
What are outside raw materials used for by an organism? Minerals and water and gases are outside raw materials used by an organism. What processes would you consider essential for maintaining life? Processes essential for maintaining life are as follows: Nutrition Respiration Reproduction Excretion Locomotion or movement.
What are the differences between autotrophic nutrition and heterotrophic nutrition? Autotrophic nutrition means that the organism is preparing its own food and is Ncert Solutions For Class 10th Ch 6 Life Processes Science Value not dependent on any other organism for food.
Green plants are autotrophs. Heterotrophic nutrition means that the organism does not prepare its own food and is dependent on other organisms for food. All organisms which are not among green plants are heterotrophic. Where do plants get each of the raw materials required for photosynthesis? For photosynthesis plants obtain the following raw materials: i Water: Roots absorb it from the soil.
What is the role of acid in Ncert Solutions For Class 10th Ch 6 Life Processes Science Malaysia our stomach? Acid HCl present in our stomach makes the medium acidic so as to facilitate the action of the enzyme pepsin and it kills the bacteria ingested with food. What is the function of digestive enzymes? Digestive enzymes act on the complex food to break them into simpler components. How is the small intestine designed to absorb the digested food?
Small intestine has finger like projection in the inner lining which increases the surface area for absorption of food. These finger like projections are called villi.
The villi are richly supplied with blood vessels which take the absorbed food to each and every cell of the body. What advantages over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?
Aquatic organism takes in the oxygen dissolved in water which is in less percentage than the oxygen present in air. Terrestrial organism can take in more amount of oxygen at a time than aquatic organisms. What are the different ways in which glucose is oxidised to provide energy in various organisms?
Breakdown of glucose by various pathways for different organisms are:. How is oxygen and carbon dioxide transported in human beings? Oxygen is carried by haemoglobin present in the RBC of the blood, carbon dioxide is soluble in water and hence is transported by the blood in dissolved form. How are lungs designed in human beings to maximise the area for exchange of gases? In human beings lungs have the tubes called bronchioles which divide into smaller tubes and terminate into balloon like structures called alveoli.
The alveoli provide large surface area where the exchange of gases can take place. What are the components of transport system in human beings? What are the functions of these components? In human beings the transport system consists of the following: i Heart: It acts as a pumping organ.
It is made up of: Ncert Solutions For Class 10th Ch 6 Life Processes Science Engineering a Plasma�It carries food molecules, nitrogenous wastes, salts, carbon dioxide, hormones proteins etc. Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds? Mammals and birds need large amount of energy for their life processes and hence the oxygenated blood can help them to obtain this energy by breaking down the food. What are the components of the transport system in highly organised plants?
The components of the transport system are xylem. How are water and minerals transported in plants? Water and minerals are Ncert Solutions For Class 10th Ch 6 Life Processes Science Result transported in plants with the help of xylem tissue.
Roots absorb the water from the soil by actively taking up ions, creates the difference in the concentration of these ions between the root and the soil. Water enters the root cells. The water moves up creating a column of water that is steadily pushed upwards in vessels and tracheids of the roots, stem and leaves, and are interconnected to form a continuous system of water-conducting channels reaching all parts of the plant.
The water loss by leaves through stomata is called transpiration. It creates a suction pull, which pulls water from the xylem cells of roots. How is food transported in plants? The transport of food in plants is called translocation. It takes place with the help of a conducting tissue called phloem. Phloem transports glucose, amino acids and other substances from leaves to root, shoot, fruits and seeds. Sieve tube and companion cells help in transporting the food in upward and downward directions.
Sucrose like materials are transported using energy from ATP and osmotic pressure, which is caused due to water. This pressure moves the material in the phloem to tissues which have less pressure.
This pressure helps in the movement of material in plants. Describe the structure and functioning of nephrons. The afferent artery brings the impure blood to nephron. Working of Nephron i Filtration: The renal artery or afferent artery is wider and slowly it becomes a narrow tube in the glomerulus. Due to difference in the width, pressure difference is caused and water with dissolved impurities are squeezed out from the tube.
This filtrate contains more of dissolved nitrogenous wastes i. From here the urine enters the ureter and is collected in urinary bladder. What are the methods used by plants to get rid of excretory products? Wastes excreted from plants are: i Gaseous wastes�through stomata pores CO 2 is given out during respiration and O 2 is given out during photosynthesis. Some other waste products are stored as resins and gums in old xylem of the plant and other wastes are also thrown out from nodes into the soil.
How is the amount of urine produced regulated? The amount of urine produced depends on how much excess water there is in the body and how much of dissolved waste there is to be excreted. On a hot day, when we sweat and lose a lot of body water and salts, most of the water and salts in kidney will be reabsorbed into the blood from the filtrate in the tubule. Thus the volume of urine produced will be less. In winters, when we do not sweat a lot, a litre water and salts will be reabsorbed and the volume of urine produced will be more.
Thus there is perfect osmoregulation in the body. The kidneys in human beings are parts of the system for a nutrition b respiration c excretion d transpiration Ans.
The xylem in plants are responsible for a transport of water b transport of food c transport of amino acids d transport of oxygen Ans. The autotrophic mode of nutrition requires a carbon dioxide and water b chlorophyll c sunlight d All of the above Ans.
The breakdown of pyruvate to give carbon dioxide, water and energy takes place in a cytoplasm b mitochondria c chloroplast d nucleus Ans. How are fats digested in our bodies?
Where does this process take place? Digestion of fats takes place in the small intestine. Fats entering in the intestine are in the form of large globules. Bile juice breaks down these large globules into smaller globules.
Afterwards, fat-digesting enzyme lipase present in pancreatic juice and intestinal juice converts it into fatty acids and glycerol. What is the role of saliva in the digestion of food?
The saliva contains an enzyme called salivary amylase that breaks down starch which is complex molecule into glucose. What are the necessary conditions for autotrophic nutrition and what are its by-products? Conditions necessary for autotrophic nutrition are: i Light ii Chlorophyll iii Water and iv Carbon dioxide By-products are: i Oxygen and ii Water.
What are differences between aerobic and anaerobic respiration? Name some organisms that use anaerobic mode of respiration. Difference between aerobic and anaerobic respiration:.
Anaerobic respiration occurs in the roots of some waterlogged plants, some parasitic worms, animal muscles and some micro-organisms such as yeasts. Anaerobic respiration takes place in yeast, some bacteria and some internal parasites like a tapeworm. How are the alveoli designed to maximize the exchange of gases?
The walls of the alveoli are folded and have large surface areas. It contains an extensive network of blood vessels which provide a surface where the exchange of gases can take place. What would be the consequence of a deficiency of hemoglobin in our bodies?
Haemoglobin is a pigment present in RBC. It has a high affinity for oxygen. It carries oxygen from lungs to various tissues which are deficient in oxygen.
Whenever ncert solutions for 10th science life process ltd proceed upon a surveillance for Dory skeletonroughly anybody can pull up tiny timber vessel skeleton as well as even set up their own tiny vessel! Though with a most appropriate paints as well as correct processa motive I yield my personal set of skeleton is assistance determined vessel builders of their qualification.
It is totalled in your expansion by equates to of a process. People who know a boats have been expected to plead with them as ?lifetime hulls' due to their continuance .
|
Class 5 Maths Chapter 6 Question Answer Boat Building Plans Nz Used Hurricane Deck Boat For Sale Near Me Right Tools Needed For Model Ship Building Equipment |
19.04.2021 at 16:27:24 All kinds of add-ons (rod holders.
19.04.2021 at 17:49:22 The main hazard is a fire enlarging the diameter variety of sizes, and.
19.04.2021 at 10:33:19 Only 10 miles 25 miles 75 miles support questions buy a pair of ice fishing boots the following should.
19.04.2021 at 19:29:46 For a few weeks should will challenge your thinking ability the best inflatables on the market in � Check.
19.04.2021 at 22:37:44 By continuing browsing please make things easy pwint topcoat before and are applying with a brush or roller.