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NEET UG Unit 3A: Population Growth, Carrying Capacity and Reproductive Strategies — practice questions

Explore 22 free Unit 3A: Population Growth, Carrying Capacity and Reproductive Strategies questions in NEET UG Environmental Science. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 3A: Population Growth, Carrying Capacity and Reproductive Strategies questions and exercises with answers

Showing questions 1–22 of 22.

Which of the following STIs is NOT completely curable when detected early?Read the answer and worked solution →The age group reported to have the highest incidence of sexually transmitted infections is:Read the answer and worked solution →Pelvic inflammatory disease (PID), ectopic pregnancy and infertility are best described as:Read the answer and worked solution →Inability to conceive despite unprotected sexual cohabitation for an extended period is termed:Read the answer and worked solution →In the In Vitro Fertilisation (IVF)/Test-Tube Baby programme, an early embryo with **up to 8 blastomeres** is transferred into the:Read the answer and worked solution →Male reproductive part of a flower is:Read the answer and worked solution →Pollination is the transfer of pollen from:Read the answer and worked solution →Endosperm of flowering plants is:Read the answer and worked solution →Fruit develops from:Read the answer and worked solution →Parthenocarpy is:Read the answer and worked solution →Cleistogamous flowers:Read the answer and worked solution →From 100 microspore mother cells in an anther, how many pollen grains will be produced?Read the answer and worked solution →In a flower, anther has 4 microsporangia. Each microsporangium has 100 MMCs. Total pollen grains:Read the answer and worked solution →Which of the following best defines reproduction in animals?Read the answer and worked solution →In which year did India initiate family planning programmes at the national level?Read the answer and worked solution →Saheli, the non-steroidal once-a-week oral contraceptive for females, was developed by which Indian research body?Read the answer and worked solution →In the natural method of periodic abstinence, the couple avoids coitus during which days of the menstrual cycle?Read the answer and worked solution →The lactational amenorrhea method of contraception is reported to be effective only up to what maximum period following parturition?Read the answer and worked solution →Which of the following is correctly classified as a copper-releasing intra uterine device (IUD)?Read the answer and worked solution →Combined oral contraceptive pills are taken daily for how many consecutive days, starting preferably within the first five days of the menstrual cycle?Read the answer and worked solution →The chapter reports that the incidence of sexually transmitted infections is very high among persons in which age group?Read the answer and worked solution →In ZIFT (zygote intra fallopian transfer), embryos with up to 8 blastomeres are transferred into which part of the female reproductive tract?Read the answer and worked solution →

Worked practice questions

Which of the following STIs is NOT completely curable when detected early?

  1. Gonorrhoea
  2. Hepatitis-B
  3. Syphilis
  4. Chlamydiasis
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Correct answer: B. Hepatitis-B

**Your syllabus explicitly notes:** *all STIs except **hepatitis-B, genital herpes and HIV** are completely curable if detected early*. Of the four options, only **Hepatitis-B** is in the not-curable list.

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The age group reported to have the highest incidence of sexually transmitted infections is:

  1. 25–45 years
  2. 15–24 years
  3. 5–14 years
  4. 45+ years
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Correct answer: B. 15–24 years

Your syllabus explicitly highlights that incidences of STIs are very high among persons aged **15–24 years**, the adolescent/young adult group.

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Pelvic inflammatory disease (PID), ectopic pregnancy and infertility are best described as:

  1. Causes of STIs
  2. Methods of contraception
  3. Primary symptoms of STIs
  4. Complications of untreated STIs
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Correct answer: D. Complications of untreated STIs

PID, abortions, still births, ectopic pregnancies, infertility and reproductive-tract cancer are **complications of untreated/late-detected STIs**, not primary symptoms (which are itching, discharge, slight pain, swellings).

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