Unisexuality of flowers prevents:
Correct answer: B. Autogamy and Geitonogamy
- A. Geitonogamy, but not Xenogamy
- B. Autogamy and Geitonogamy
- C. Autogamy, but not Geitonogamy
- D. Both Geitonogamy and Xenogamy
Explanation
Unisexuality of flowers prevents autogamy (self-pollination) and geitonogamy (pollination between flowers of the same plant), as both require the presence of both male and female reproductive parts in a single flower. In unisexual flowers, either male or female reproductive organs are present, making it impossible for the flower to self-pollinate or for flowers on the same plant to cross-pollinate. This promotes outcrossing (xenogamy) by requiring pollination between flowers on different plants.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Reproduction
Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.
Practise Reproduction
1,220 free Reproduction MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Reproduction questions
Vegetative propagation in mint occurs by:
Vegetative propagation in Pistia occurs by:
Examine the figures (A - D) given below and select the right option out of (a - d), in which all the four structures A, B, C, and D are identified correctly:
Which one of the following is resistant to enzyme action?
Male gametes in angiosperms are formed by the division of:
Two plants can be conclusively said to belong to the same species if they: