A. In roses,the endosperm is formed after fer | vedclass

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(A) $1$. In angiosperms (like roses),the endosperm is formed as a result of the fusion of one male gamete with two polar nuclei (or a secondary nucleu

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$A$ and $R$ are both true,and $R$ is the correct explanation of $A$.

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(A) $1$. In angiosperms (like roses),the endosperm is formed as a result of the fusion of one male gamete with two polar nuclei (or a secondary nucleus),a process known as triple fusion.$2$. Triple fusion is a part of the double fertilization process,which occurs only after the pollen tube enters the embryo sac.$3$. Therefore,the formation of the endosperm in angiosperms is a post-fertilization event.$4$. Both statements $A$ and $R$ are correct,and $R$ (the occurrence of double fertilization) is the reason why the endosperm (a product of triple fusion) is formed after fertilization.

Structure	Cellular structure	Flagella	Wall
$(a)$ Zoospore	Unicellular	Present	Absent
$(b)$ Conidia	Unicellular	Absent	Present
$(c)$ Gamete	Unicellular	Can be present	Can be present

$A.$ In roses,the endosperm is formed after fertilization.
$R.$ Double fertilization is observed in angiosperms.

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$A.$ In roses,the endosperm is formed after fertilization.$R.$ Double fertilization is observed in angiosperms.