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UP Board Class 10 Life Processes in Living Organisms Part 2 — practice questions — page 3

Explore 77 free Life Processes in Living Organisms Part 2 questions in UP Board Class 10 Science. Open each question or exercise to read its content, reference answers and available explanation.

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Life Processes in Living Organisms Part 2 questions and exercises with answers

Showing questions 61–77 of 77.

Which of the following is a sexually transmitted bacterial disease?Read the answer and worked solution →In an angiosperm, the haploid cell that fuses with the egg to form the zygote is the:Read the answer and worked solution →Pollination by wind tends to produce flowers that are:Read the answer and worked solution →Fission divides the parent cell into two equal halves, whereas multiple fission divides it into:Read the answer and worked solution →Which of the following is NOT a method of contraception?Read the answer and worked solution →A flower that has both stamens and pistils is called:Read the answer and worked solution →Order the path of a reflex actionRead the answer and worked solution →Match each plant response to its nameRead the answer and worked solution →Which part of the brain does the job?Read the answer and worked solution →Tap every plant hormoneRead the answer and worked solution →True or false: control and coordinationRead the answer and worked solution →Asexual or sexual reproduction?Read the answer and worked solution →Match each organism to how it reproducesRead the answer and worked solution →Tap every vegetative propagation methodRead the answer and worked solution →True or false: reproductionRead the answer and worked solution →Order the steps from pollen to embryoRead the answer and worked solution →Which one does NOT belong?Read the answer and worked solution →

Worked practice questions

Which of the following is a sexually transmitted bacterial disease?

  1. AIDS
  2. Syphilis
  3. Genital herpes
  4. Hepatitis B
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Correct answer: B. Syphilis

1. Syphilis is caused by the bacterium Treponema pallidum. 2. AIDS (HIV), genital herpes (HSV) and Hepatitis B are viral. 3. Hence syphilis is the bacterial entry in this list. _Source: syllabus Science, Ch 7 "How do Organisms Reproduce", §7.3.4_

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In an angiosperm, the haploid cell that fuses with the egg to form the zygote is the:

  1. Antipodal cell (option)
  2. Synergid
  3. Polar nucleus
  4. Male gamete from the pollen
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Correct answer: D. Male gamete from the pollen

1. A pollen grain carries two male gametes. 2. One fuses with the egg to form the diploid zygote (syngamy). 3. The other fuses with two polar nuclei to form triploid endosperm; synergids and antipodals do not fuse. _Source: syllabus Science, Ch 7 "How do Organisms Reproduce", §7.3.2_

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Pollination by wind tends to produce flowers that are:

  1. Small, dull-coloured, with large amounts of light pollen
  2. Large, brightly coloured, with sticky pollen (option)
  3. Tube-shaped with nectar
  4. Closed and self-pollinating only
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Correct answer: A. Small, dull-coloured, with large amounts of light pollen

1. Wind cannot be attracted by colour or scent. 2. Selection therefore favours small, drab flowers with copious lightweight pollen. 3. Bright colour and nectar are adaptations for animal pollinators. _Source: syllabus Science, Ch 7 "How do Organisms Reproduce", §7.3.2_

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