Skip to content 1 In animals, which fertilisation method the gametes are more protected?
VS (Very Small)
2 If a couple uses oral contraceptive pills but not condoms, which risks remain and why?
SA (Short)
3 What protective devices can be used during sexual activity to reduce the spread of STIs?
VS (Very Small)
4 Rina's period occurs every 28 days.
SA (Short)
5 Ravi suddenly notices that he is growing taller rapidly, his shoulders are broadening, and his voice cracks.
VS (Very Small)
6 A human zygote has just formed.
VS (Very Small)
7 A flower's anthers are removed before it matures.
MCQ (Multiple Choice)
8 Arrange the following stages of sexual reproduction in plants in the correct order:
VS (Very Small)
9 In many animals, the young ones can walk or find food soon after birth but human babies are completely dependent on adults for a long time.
SA (Short)
10 Assertion (A): The zygote formed after fertilisation immediately attaches to the uterus wall.
AR (Assertion & Reason)
11 Why does asexual reproduction produce offspring that are genetically identical to the parent?
SA (Short)
12 Why are flowers that bloom at night white or light in colour as compared to flowers that bloom during the day?
SA (Short)
13 Why do vegetatively propagated plants tend to be more vulnerable to diseases than sexually reproduced plants?
SA (Short)
14 If all flowers in a type of plant were only capable of self-pollination, how would it affect the genetic diversity over several generations?
SA (Short)
15 Explain why the menstrual cycle stops during pregnancy.
SA (Short)
16 Suresh prepares slides with pollen grains in different sugar concentrations (0%, 2.5%, 5%, 7.5%, 10%) to study the germination of pollen.
LA (Long)
17 A farmer wants to produce a large number of genetically identical plants quickly.
LA (Long)
18 Look at the picture given below and think in line with the given prompts and find out which type(s) of pollination might have been followed in these flowers.
SA (Short)
19 In the lower Himalayan region of Northern India, apples are an important cash crop that contribute significantly to farmer's livelihoods.
CB (Case Based)
20 A student claims, "In humans, ovulation always happens on day 14 of the menstrual cycle." Critically examine this claim and state whether the claim is correct or not. Give at…
SA (Short)
21 When does a farmer prefer asexual or sexual methods of reproduction for crops production?
SA (Short)
22 Why do you think most complex animals and flowering plants use sexual reproduction, while many simple organisms, like yeast and hydra mainly reproduce asexually?
SA (Short)
23 Look at the pictures of Calotropis (madar) seeds and dandelion seeds given below.
SA (Short)
24 Why do animals with external fertilisation generally produce more eggs than animals with internal fertilisation?
SA (Short)
25 A farmer plants two varieties of maize side by side, but notices that seeds form only when pollen from one variety reaches the stigma of the other.
SA (Short)
26 In a china-rose (Hibiscus or gudhal) plant, a pollen tube grows and continues through the style after pollen lands on the stigma.
SA (Short)