Home
Class 11
BIOLOGY
Assertion:Aschelminthes are called as ps...

Assertion:Aschelminthes are called as pseudo-coelomates.
Reason : In Aschelminthes, mesoderm is present as scattered pouches in between ectoderm and endoderm.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
a

In Aschelminthes, the body cavity is not lined by mesoderm, instead, the mesoderm is present as scattered pouches in between the ectoderm and endoderm. Hence, they are called pseudocoelomates.
Promotional Banner

Similar Questions

Explore conceptually related problems

In Aschelminthes, the body cavity is not formed by mesoderm. So, they are called as ……………

Assertion: The spaces left between soil particles are called pore spaces. Reason: Many organism like bacteria, fungi etc, exist in the soil.

Assertion : Blood group O is called universal donor: Reason : Beeause no agglutinatin antigen is present in O blood group .

Assertion: The gap between the canines and premolar is called diastema. Reason: It helps in mastication and chewing of food in herbivorous animals.

Assertion:The space between the cornea and the lens is called the vitreous chamber. Reason:The space between the lens and retina is called the aqueous chamber.

Assertion : Secondary treatement of sewage is also called biological treatment while primary treatment is called physical treatment. Reason : Primary sewage treatment depends only upon sedimentation properties of materials present in sewage and filtration.

Assertion: The least value that can be measured using screw gauges, vernier calipers is called least count. Reason:The magnitude of difference between the true value and the measured value is called relative error or fractional error.

Assertion: Secondary growth usually occurs in dicotyledonous stems. Reason: The vascular cambium present between xylem and phloem possesses the ability to form secondary xylem and secondary phloem respectively.