Assertion : Pollen mother cells (PMCs) are the first male gametophytic cells..Reason : Each PMC gives rise to two pollens..(a) Both A and R are true and R is the correct explanation of A.(b) Both A and R are true but R is not the correct explanation of A.(c) A is true but R is false.(d) Both A & R are false
Question
Assertion : Pollen mother cells (PMCs) are the first male gametophytic cells..Reason : Each PMC gives rise to two pollens..(a) Both A and R are true and R is the correct explanation of A.(b) Both A and R are true but R is not the correct explanation of A.(c) A is true but R is false.(d) Both A & R are false
Solution
(b) Both A and R are true but R is not the correct explanation of A.
Explanation: Assertion: Pollen mother cells (PMCs) are indeed the first male gametophytic cells. They are diploid cells present in the anther of a flower, which undergo meiosis to form pollen grains.
Reason: Each PMC does give rise to pollen grains, but it is not just two. It actually gives rise to four pollen grains. This happens through a process called meiosis where the PMC divides twice to form four haploid cells or pollen grains. Therefore, the reason is true in that PMCs give rise to pollen grains, but it is not correct in stating that each PMC gives rise to only two pollen grains. Hence, the reason is not the correct explanation of the assertion.
Similar Questions
n the following Questions, the Assertion and Reason have been put forward. Read the statements carefully andchoose the correct alternative from the following: (2 MARKS) a) Both the Assertion and the Reason are correct andthe Reason is the correct explanation of the Assertion. b) The Assertion and the Reason are correct but the Reasonis not the correct explanation of the Assertion. c) Assertion is true but the Reason is falsed) The statement of the Assertion is false but the Reason is true.a. Assertion: In both plant and animal cells, the main area of cellular activities is cytoplasm.Reason: Various chemical reactions occur in cytoplasm to keep the cell in living state.b. Assertion: Living organisms are composed of cells and products of cells.Reason: All cells arise from pre-existing cells
In the seed plants, the male gametophytes are called ______, which produces sperm cells.Multiple choice question.trichomespollenconesphloem
Which structure contains the male gametophyte of the plant?Question 12Select one:a.root tipb.Pistolc.Pollen graind.Stamen
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).
Assertion (A) - Birds are oviparous animals.Reason (R) - Birds show external fertilization.(a) Both A and R are true and R is the correct explanation of A.(b) Both A and R are true but R is not the correct explanation of A.(c) A is true but R is false.(d) A is false but R is true
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.