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(A) The process of seed development is considered an evolutionary precursor to the seed habit in plants.$1$. Heterospory is the production of two diff

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Heterospory

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(A) The process of seed development is considered an evolutionary precursor to the seed habit in plants.$1$. Heterospory is the production of two different types of spores (microspores and megaspores) by the plant.$2$. In heterosporous plants,the megaspore is retained within the parent sporophyte for variable periods.$3$. The development of the zygote into young embryos takes place within the female gametophytes retained on the parent sporophytes.$4$. This event is a precursor to the seed habit considered an important step in evolution,which is found in plants like $Selaginella$ and $Salvinia$.

Column-$I$	Column-$II$
$A$. Dryopteris (Fern)	$p$. Homosporous
$B$. Selaginella	$q$. Fossil
$C$. Equisetum	$r$. Heterosporous
$D$. Rhynia	$s$. Common

Which of the following is considered significant in the process of seed development?

Similar Questions

What type of spores are produced by the plant shown in the given figure?

Assertion $(A)$: $Selaginella$ is heterosporous.
Reason $(R)$: The strobili of $Selaginella$ are unisexual.

$A$ characteristic feature of Pteridophytes is that they $..........$

What is the nature of the gametophytic stage in Pteridophytes?

Match the Pteridophytes in Column-$I$ with their characteristics in Column-$II$ and select the correct option.
Column-$I$ Column-$II$
$A$. Dryopteris (Fern) $p$. Homosporous
$B$. Selaginella $q$. Fossil
$C$. Equisetum $r$. Heterosporous
$D$. Rhynia $s$. Common

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