passive and active

Ram thanked Hari.Hari was thanked by Ram.In the first sentence the emphasis is on the doer, Ram.In the second sentence the emphasis is on the action, was thank..

Active Immunity - Active immunity develops as a result of the contact of an individual with pathogenic organisms or their products. They stimulate the body to produce antibodies in response to the antigens. The immunity thus produced is specific for a particular disease. For e.g..

Communication Systems..

Active Voice - A verb is in the Active Voice when its form shows that the person or thing denoted by the subject is the doer of the action. In all these sentences the person denoted by the subject does something. These verbs are in Active Voice. Jim helps Joseph The ca..

The transport of materials across the cell membranes with the help of energy is called active transport. Both diffusion and osmosis are passive transport mechanisms, not requiring energy. Active transport helps in the transport of ions across the membranes of the cells..

>By negative charges of organic acids when they lose H + ions Thus all these factors lead to the opening of stomata. The stomata closure is due to excretion of K + ions from guard cells surrounding epidermal and subsidiary cells. The stomatal closure is considered to be brought about by a pass..

1. Active voice Passive voice will be: The tree was cut down by the man. 2. Active voice Passive voice will be: A letter will be written to him by my father. 3. Active voice Passive voice will be: The ball was caught by the boy. 4. P..

Taking food in the soluble forms into the tissues. This involves the absorption of food in the soluble form from the region of digestion into the tissues or into where it has to be utilised or into the blood stream which transports it to the different tissues. This takes place through the cell mem..

Various theories have been proposed to explain the mechanism of mineral salt absorption and can be placed under the following two categories: 1. Passive absorption 2. Active absorpti..

This is an immunity developed by an animal in response to a disease caused by infection of pathogens. It is very specific and prevents further attacks. It lasts for the whole life of the organism in certain cases and for a few years in others. Acquired immunity is further of two types - natural or ..