$A.$ In $Volvox$,the zygote undergoes meiosis to form four haploid cells immediately before germination.
$R.$ $Volvox$ exhibits a haplontic life cycle.
$R.$ $Volvox$ exhibits a haplontic life cycle.
- A$A$ and $R$ are both true,but $R$ is not the correct explanation of $A$.
- B$A$ and $R$ are both true,and $R$ is the correct explanation of $A$.
- C$A$ is true and $R$ is false.
- D$A$ is false and $R$ is true.
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Similar Questions
Which of the following characteristics is common to both Gymnosperms and Angiosperms?
Medium
View SolutionMatch the following columns:
Column-$I$ Column-$II$ $(A)$ Christmas tree $(i)$ Bennettites $(B)$ Fossil plant $(ii)$ Cycas $(C)$ Ornamental plant $(iii)$ Araucaria $(D)$ Tallest tree $(iv)$ Sequoia $(v)$ Thuja
| Column-$I$ | Column-$II$ |
| $(A)$ Christmas tree | $(i)$ Bennettites |
| $(B)$ Fossil plant | $(ii)$ Cycas |
| $(C)$ Ornamental plant | $(iii)$ Araucaria |
| $(D)$ Tallest tree | $(iv)$ Sequoia |
| $(v)$ Thuja |
Medium
View SolutionRead carefully the following statements:
$I.$ Funaria possesses unicellular and unbranched rhizoids.
$II.$ Gemmae are asexual buds, which originate from small receptacles called gemma cups.
$III.$ The Sphagnum plants have a magnificent property of retaining water.
$IV.$ Mosses along with lichens are the first organisms to colonise rocks.
Which of the statements given above are correct?
$I.$ Funaria possesses unicellular and unbranched rhizoids.
$II.$ Gemmae are asexual buds, which originate from small receptacles called gemma cups.
$III.$ The Sphagnum plants have a magnificent property of retaining water.
$IV.$ Mosses along with lichens are the first organisms to colonise rocks.
Which of the statements given above are correct?
Medium
View SolutionMatch the Column-$I$ with Column-$II$ and choose the correct option from the following:
Column-$I$ (Plant groups) Column-$II$ (Examples) $1$. Bryophyta $p$. Pinus $2$. Gymnosperm $q$. Adiantum $3$. Algae $r$. Sphagnum $4$. Pteridophyta $s$. Ectocarpus
| Column-$I$ (Plant groups) | Column-$II$ (Examples) |
|---|---|
| $1$. Bryophyta | $p$. Pinus |
| $2$. Gymnosperm | $q$. Adiantum |
| $3$. Algae | $r$. Sphagnum |
| $4$. Pteridophyta | $s$. Ectocarpus |
Which book is considered the starting point of phylogenetic systems of classification?
Easy
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