Home
Class 11
BIOLOGY
In gymnosperms, the male and the female ...

In gymnosperms, the male and the female gametophytes do not have an independent free-living existence. (True/False)

Text Solution

AI Generated Solution

The correct Answer is:
To determine whether the statement "In gymnosperms, the male and female gametophytes do not have an independent free-living existence" is true or false, we can analyze the characteristics of gymnosperms and their reproductive structures. ### Step-by-Step Solution: 1. **Understanding Gymnosperms**: Gymnosperms are a group of seed-producing plants that include conifers, cycads, ginkgo, and gnetophytes. They are characterized by having seeds that are not enclosed in an ovary (unlike angiosperms). 2. **Gametophyte Generation**: In the life cycle of gymnosperms, there are two generations: the sporophyte (the dominant, diploid generation) and the gametophyte (the haploid generation). The gametophytes develop from spores. 3. **Male Gametophyte**: The male gametophyte in gymnosperms is represented by pollen grains. These pollen grains are produced in the male cones (or strobili) and do not exist independently; they are dependent on the sporophyte for their development. 4. **Female Gametophyte**: The female gametophyte develops within the ovule, which is located in the female cones. Similar to the male gametophyte, the female gametophyte does not have an independent existence outside of the ovule. 5. **Conclusion**: Since both the male and female gametophytes are retained within the sporangia (pollen sacs for males and ovules for females) and do not exist freely in the environment, the statement is indeed true. ### Final Answer: The statement is **True**. ---
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Some statements are given below :- (a) In gymnosperms the male and the female gametophytes do not have an independent free-living existence (b) In Cycas foliage leaves are pinnately compound (c) The stems are branched in Pinus and Cedrus (d) In Pinus, male cones and female cones are borne on different trees. Out of them, which statements are correct ?

Assertion : The leaves in gymnosperms are well adapted to withstand extremes of temperature, humidity and wind Reason : Unlike bryophytes and pteridophytes, in gymnosperms the male and female gametophytes do not have an independent free living existence.

Male and female gametophytes are independent and free-living in

Male and female gametophytes are independent and free-living in

Male and female gametophytes are independent and free-living in

The gametophyte is not an independent, free-living generation in

The gametophyte is not an independent, free-living generation in

Assertion: In gymnosperms, the male and female gametophytes do not have indepenent existance. Reason: They remain within the sporangia retained on the sporophyte.

Consider the following statements regarding gymnosperms (A) In gymnospers, the male and female gametophytes have an independent existence (B) The multicellular female gametophyte is retained within the megasporangium (C) The gymnosperms are heterosporous Of these statements.

Gymnosperms do not have

ALLEN-DIVERSITY OF THE LIVING WORLD-Exercise
  1. Female cone to Mega sporophylls to Megasporongia to Megaspores For a...

    Text Solution

    |

  2. Identify the name of processes (A&B) in the given sequence Microspor...

    Text Solution

    |

  3. In gymnosperms, the male and the female gametophytes do not have an in...

    Text Solution

    |

  4. In gymnosperms, the nucellus is protected by envelops and the composit...

    Text Solution

    |

  5. How many cells are there in an embryo sac?

    Text Solution

    |

  6. Write the names of male and female sex organs of angiosperms respectiv...

    Text Solution

    |

  7. In how many classes angiosperms are divided?

    Text Solution

    |

  8. Ovules, stamen, ovary, carpel, anther, antipodals, synergids, Pollen g...

    Text Solution

    |

  9. Angiosperms range in size from tiny, almost microspic e.g. (A) to tall...

    Text Solution

    |

  10. Total number of nuclei involved in double fertilization is

    Text Solution

    |

  11. Write down the ploidy level of followings regarding typical angiosperm...

    Text Solution

    |

  12. After fertilization, what is the future of the following:- (A) Ovule...

    Text Solution

    |

  13. Identify the A,B,C, D & E in given life cycle of an angiosperm:-

    Text Solution

    |

  14. Many algae such as volvox, spirogyara and some species of Chlamydomona...

    Text Solution

    |

  15. Which kind of life cycle pattern is shown by all seed-bearing plants?

    Text Solution

    |

  16. The life cycle of any sexually reproducting plant, there is an alterna...

    Text Solution

    |

  17. Which processes are essential for alternation of generation in plant l...

    Text Solution

    |

  18. In bryophytes, what is the dominant phase of life cycle?

    Text Solution

    |

  19. In, a dominant and independent diploid sporophyte alternates with a sh...

    Text Solution

    |

  20. "The short-lived multicellular sporophyte totally or partially depende...

    Text Solution

    |