Last seen: Sep 10, 2021
Water and minerals are transported in plants through the xylem tissues, which consist of interconnected vessels and tracheids stretching from the root...
The transport systems of highly organised plants are: (a) Xylem: This tissue helps in transportation of water and dissolved minerals from roots to o...
Separation of oxygenated and deoxygenated blood allows a highly efficient supply of oxygen to the body. Since mammals and birds have high energy needs...
The components along with functions of transport system in human beings are as: Heart: It is a muscular pumping organ that helps to pump blood aroun...
The lungs have special air sacs called ‘alveoli’. The presence of air sac increases the surface area inside the lungs. Alveoli are the places where ex...
Oxygen and carbon dioxide are transported in human beings with the help of ‘transportation system’. Transport of oxygen: The air present in the alve...
The small intestine has several folds in its inner mucous layer called villi. The presence of folds increases the surface area and thereby increases t...
The water has oxygen dissolved in it. On the other hand, the air has oxygen gas present freely. Beside this, the concentration of oxygen is more in th...
Autotrophic nutrition: 1. The organism prepares its own food. 2. It is not dependent on any other organism for their food. Example: Green plant...
The function of digestive enzymes is to hasten the process of digestion in which complex molecules break down into simpler molecules which are then ea...
The acid (hydrochloric acid) formed in our stomach helps in killing unwanted harmful germs which may have gained entry along with the food. It is secr...
Plants get carbon dioxide from atmosphere. It gets water and minerals from the soil.
The outside raw materials used for by an organism are: (a) Food for obtaining energy. (b) Oxygen to use it in the process of breakdown of food sou...
Growth, movement or locomotion, response to, stimuli and ability to reproduce are the criteria that we use to decide whether something is alive.
In multicellular organisms, only the cells present in the surface layer are in direct contact with the surrounding environment, whereas other cells ar...
Nutrition, respiration, transportation and excretion.
The main points of distinction between Mendeleev’s Periodic Table and Modern Periodic Table are: Mendeleev’s Periodic Table: 1. It regards the ato...
Only those elements are placed in the same group in which the gaps of atomic numbers are: 8, 8, 18, 18, 32. If we look at the atomic numbers of the el...
The Modern Periodic Table is based on atomic numbers of the elements. Since electronic configurations of the elements depend upon their atomic numbers...
The electronic configurations of the two elements are nitrogen (Z = 7) 2, 5; Phosphorus (Z = 15) 2,8, 5. Since the size of nitrogen is small as com...