Solve
Guides
0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Standard XII
Biology
Question

Assertion :Unit of nervous tissue is cyton. Reason: The nerve tissue is developed from ectoderm.
  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
  2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
  3. Assertion is correct but Reason is incorrect.
  4. Assertion is incorrect but Reason is correct.

A
Assertion is correct but Reason is incorrect.
B
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
C
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
D
Assertion is incorrect but Reason is correct.
Open in App
Solution
Verified by Toppr

  • The basic, fundamental unit of nervous tissue is a neuron.
Vertebrates are triploblastic i.e. their embryo possesses three layers of cells at the initial stages. These layers are ectoderm, mesoderm, and endoderm. Each layer gives rise to a particular system. Nerve tissue is made up of ectoderm. Therefore, the reason is correct.

Was this answer helpful?
0
Similar Questions
Q1
Assertion: The compressibility factor for H2​ and He is (1+PbRT)
Reason: The compressibility factor for H2​ and He can be derived from Van der Waal's equation.
View Solution
Q2

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

View Solution
Q3

Assertion (A) Order and molecularity are same.

Reason (R) Order is determined experimentally and molecularity is the sum of the stoichimetric coeffcient of rate determining elementary step.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

View Solution
Q4

Assertion (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

View Solution
Q5

Assertion – The non-fusible impurities present in iron ore are removed by CaCO3 .

Reason: CaCO3 which decomposes into CaO and CO2. The CaO formed reacts with SiO2 to remove silica


View Solution