Assertion (A): Sexual reproduction in Ulothrix and Spirogyra is oogamous.Reason (R) : Male and female gametes are flagellated and similar in size (as in Ulothrix) or non flagellated (non motile) but similar in size (as in Spirogyra). Both (A) & (R) are correct but (R) is not the correct explanation of (A).(A) is correct but (R) is not correct.(A) is not correct but (R) is correct.Both (A) & (R) are correct and (R) is the correct explanation of (A).
Question
Assertion (A): Sexual reproduction in Ulothrix and Spirogyra is oogamous.Reason (R) : Male and female gametes are flagellated and similar in size (as in Ulothrix) or non flagellated (non motile) but similar in size (as in Spirogyra). Both (A) & (R) are correct but (R) is not the correct explanation of (A).(A) is correct but (R) is not correct.(A) is not correct but (R) is correct.Both (A) & (R) are correct and (R) is the correct explanation of (A).
Solution
Let's analyze each statement:
Assertion (A): Sexual reproduction in Ulothrix and Spirogyra is oogamous. This statement is incorrect. Oogamous reproduction involves a large, non-motile egg and a small, motile sperm. However, in Ulothrix, the sexual reproduction is isogamous, involving similar-sized gametes. In Spirogyra, the sexual reproduction is conjugation, not oogamy.
Reason (R): Male and female gametes are flagellated and similar in size (as in Ulothrix) or non-flagellated (non-motile) but similar in size (as in Spirogyra). This statement is correct. In Ulothrix, the gametes are similar in size and both are flagellated. In Spirogyra, the gametes are also similar in size and non-motile.
So, the correct answer is "(A) is not correct but (R) is correct."
Similar Questions
Which of the following accurately describes reproduction in Ulva? a) the sporophyte releases quadri-flagellate zoospores by mitosis b) it produces a diploid gametophyte that is otherwise isomorphic to the sporophyte c) by combining sexual and asexual reproduction, Ulva has evolved anisogamy d) sexual reproduction occurs via isogametes, asexual reproduction occurs via bi-flagellate zoospores.
What type of reproduction involves the fusion of male and female gametes?
Reproduction resulting from the fusion of two gametes.Group of answer choicesasexual reproductionsexual reproduction
Assertion :- Sexual reproduction of Spirogyra is isogamous type.Reason :- Both of the fusing gametes of Spirogyra are nonflagellated and similar in size.Both Assertion and Reason are true and Reason is the correct explanation of Assertion.Both Assertion and Reason are true but Reason is not correct explanation of Assertion.Assertion is true but Reason is false.Assertion is false but Reason is true.
Males have higher reproductive potential than females becauseGroup of answer choicesFemales are the sex that gestates the fetus from conception to birthFemales are the sex that suckles the offspringMales can mate multiple females each breeding seasonAll of the abov
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.