If an individual is a carrier of an infectious disease, he is BOTH ASYMPTOMATIC AND INFECTIVE . An asymptomatic and infective carrier refers to a person, who is a carrier of a disease or has a disease causing infective agent in his system [that is, the person is infected with an infectious disease] but who is not showing any symptom of the disease. Carriers are not usually affected by the disease concerned but they can easily transmit it to other people.
Answer: Organisms depend on other organisms and on the nonliving things in an ecosystem to meet their basic needs for food, water and protection. 3. Plants use energy from the sun to produce their own food from air and water.
Hydrogen Bonding. A hydrogen bond is a weak type of force that forms a special type of dipole-dipole attraction which occurs when a hydrogen atom bonded to a strongly electronegative atom exists in the vicinity of another electronegative atom with a lone pair of electrons
