(A) The correct answer is $A$. During the process of gastrulation,the embryo forms a structure called the gastrula. The gastrula contains an opening o

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(A) The correct answer is $A$. During the process of gastrulation,the embryo forms a structure called the gastrula. The gastrula contains an opening or pore known as the $Blastopore$. $Blastopore$ is the first opening formed in the early embryo,which later develops into either the mouth or the anus depending on the organism (protostomes or deuterostomes).

Class 12 Biology Human Reproduction Pregnancy and Embryonic development

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Gastrula has a pore which is known as . . . . . .

KCET 2010 All KCET

A
Blastopore
B
Zoospore
C
Gonophore
D
Oospore

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Class 12

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Human Reproduction

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Pregnancy and Embryonic development

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What is the average nine-month period of human pregnancy called?

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What is the process of gastrulation?

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Match List-$I$ with List-$II$ related to embryonic development at various months of pregnancy:
List-$I$ List-$II$
$A$. The foetus movement starts and hair appears on the head $I$. $24$ weeks of pregnancy
$B$. The foetus develops limbs and digits $II$. $20$ weeks of pregnancy
$C$. The foetus develops external genital organs $III$. $8$ weeks of pregnancy
$D$. The foetus body is covered with fine hair; eyelids separate and eyelashes are formed $IV$. $12$ weeks of pregnancy
Choose the correct answer from the options given below:

List-$I$	List-$II$
$A$. The foetus movement starts and hair appears on the head	$I$. $24$ weeks of pregnancy
$B$. The foetus develops limbs and digits	$II$. $20$ weeks of pregnancy
$C$. The foetus develops external genital organs	$III$. $8$ weeks of pregnancy
$D$. The foetus body is covered with fine hair; eyelids separate and eyelashes are formed	$IV$. $12$ weeks of pregnancy

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