Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
During a menstrual cycle, how many ova are typically released during ovulation?
The summary for 'HUMAN REPRODUCTION' states: 'During ovulation only one ovum is released per menstrual cycle.'
What induces the cyclical changes in the ovary and the uterus during the menstrual cycle?
The summary for 'HUMAN REPRODUCTION' states: 'The cyclical changes in the ovary and the uterus during menstrual cycle are induced by changes in the levels of pituitary and ovarian hormones.'
Which of the following is NOT listed as a category of contraceptive option available in the provided text?
The text states: 'Various contraceptive options are available now such as natural, traditional, barrier, IUDs, pills, injectables, implants and surgical methods.' Herbal remedies are not explicitly mentioned.
What is the primary step identified towards achieving reproductive health, according to the 'REPRODUCTIVE HEALTH' chapter summary?
The summary mentions: 'Counselling and creating awareness among people about reproductive organs, adolescence and associated changes, safe and hygienic sexual practices, sexually transmitted infections (STIs) including AIDS, etc., is the primary step towards reproductive health.'
Medical Termination of Pregnancy (MTP) is legalized in India. Which of the following is listed as a reason for its performance?
The text states: 'Medical termination of pregnancy is legalised in our country. MTP is generally performed to get rid of unwanted pregnancy due to rapes, casual relationship, etc., as also in cases when the continuation of pregnancy could be harmful or even fatal to either the mother, or the foetus or both.'
What term is used to describe infections or diseases transmitted through sexual intercourse?
The text defines: 'Infections or diseases transmitted through sexual intercourse are called Sexually Transmitted Diseases (STIs).'
Human males are described as being sexually reproducing and what other characteristic?
The summary for 'HUMAN REPRODUCTION' explicitly states: 'Humans are sexually reproducing and viviparous.'
What is the term for the transfer of sperms into the female genital tract?
The text states: 'The reproductive events in humans include formation of gametes (gametogenesis), i.e., sperms in males and ovum in females, transfer of sperms into the female genital tract (insemination)...'
The attachment of the blastocyst to the uterine wall is known as:
The text describes the sequence of events as: '...fusion of male and female gametes (fertilisation) leading to formation of zygote. This is followed by formation and development of blastocyst and its attachment to the uterine wall (implantation)...'
Which of the following methods is NOT accurately described as a direct gene transfer method for introducing alien DNA into host cells?
The heat shock and chilling method aims to make bacterial cells competent to take up DNA from their surroundings, rather than directly injecting or bombarding the DNA. The NCERT states, 'Recombinant DNA can then be forced into such cells by incubating the cells with recombinant DNA on ice, followed by placing them briefly at 42°C (heat shock), and then putting them back on ice. This enables the bacteria to take up the recombinant DNA.'
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