Human Reproduction Important Questions for CBSE Class 12 Biology Fertilisation, Pregnancy and Embryonic Development 1. Fertilisation is the process of fusion of a sperm with an ovum. (i)Semen of a male is transferred by the penis to the vagina of female during copulation (coitus) and is called insemination. (ii)Spermatozoa move through the cervix, enter the uterus and reach … [Read more...]
NCERT Solutions For Class 12 Biology Biotechnology:Principles And Processes
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Important Questions for CBSE Class 12 Biology Adolescence and Drug/Alcohol Abuse
Human Health and Disease Important Questions for CBSE Class 12 Biology Adolescence and Drug/Alcohol Abuse 1.Drugs and alcohol when taken for the purpose other than medicinal or taken in amount or frequencies that disturbs the physical, physiological or psychological functions, is called drug abuse and alcohol abuse, respectively. 2.Statistics show that use of drugs and … [Read more...]
Important Questions for CBSE Class 12 Biology Health, Common Diseases in Human and Immunity
Human Health and Disease Important Questions for CBSE Class 12 Biology Health, Common Diseases in Human and Immunity 1.Health is defined as a state of complete physical, mental and social well-being. (i)The factors which affect human health are: (a)Genetic disorders (b) Infections (c) Lifestyle. (ii)Balanced diet, personal hygiene and regular exercise are very … [Read more...]
Important Questions for CBSE Class 12 Biology Pollution, Solid and Radioactive Wastes
Environmental Issues Important Questions for CBSE Class 12 Biology Pollution, Solid and Radioactive Wastes 1.Pollution is an undesirable change'in the physical, chemical and biological characteristics of air, water, land and soil. Pollutants are agents that cause undesirable change in the environment. The Government of India has passed the Environment Protection Act, … [Read more...]