NEET Biology MCQ on Segmentation and Notochord with Answers by Expert Teacher. Every Questions of Segmentation and Notochord is Important and Common for NEET-UG Exam.
1.) In which of the following animal, internal segmentation matches with external segmentation?
a) Housefly
b) Earthworms
c) Shark
d) Flatworm
2.) Identify the correct statement that defines ‘Metamerism’.
a)When an organism have a support of skeletal rod to the body then it is known as Metamerism.
b)When an organism show hollow gut then it is referred to as Metamerism.
c)When an organism show metameric segmentation then it is known as Metamerism.
d)When an organism contains stinging Capsules then it is known as Metamerism.
3.) During the embryonic development, a formation of rod-like structure occurs on the mid-dorsal surface of few animals is:
a) Segment
b) Peritoneum
c) Mesoderm
d) Notochord
4.) ………………………………………………………………………….. Starts appearing in the process of Notochord formation.
a) Caudal pit
b) Prechordal Plate
c) Neural tube
d) Notochordal Plate
5.) When notochordal plate detach from endoderm then ……………………………………………………………………….……. Forms which is a solid cord of cells.
a) A definitive notochord
b) Embryonic disc
c) Allantois
d) None of them
Answers:
1.)
Solution:b) Earthworms
Here, the housefly and flatworm both have unsegmented body. Shark have a normal unsegmented body. Earthworm is the one whose external segmentation matches with internal segmentation. And this type of animals are known as metamerically segmented animals.
2.)
Solution:c) When an organism show metameric segmentation then it is known as Metamerism.
When an organism have a support of skeletal rod to the body then the organism show notochord. When an organism show hollow gut then it belongs to coelenterate. Animals having metameric segmentation and this phenomenon is known as Metamerism. Hence option ‘c)’ is the right answer.
3.)
Solution: d) Notochord
Some animals form a rod-like structure on the mid-dorsal surface, that formation is known Notochord.
4.)
Solution:b) Prechordal Plate
A formation between the tip of the notochord and the oropharyngeal membrane is called as Prechordal Plate. The Prechordal Plate starts appearing in the process of notochord formation.
5.)
Solution:a) A definitive notochord
A solid cord of cells that forms by the notochordal plate which proliferate as well as detach form endoderm is called as a Definitive notochord.