Tissues#!#Assertion And Reason

Read the assertion and reason carefully to mark the correct option out of the options given below: (a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion (c) If the assertion is true but the reason is false (d) If both the assertion and reason are false (e) If the assertion is false but reason is true Assertion : An artifical pacemaker can replace the sinoatrial node of heart. Reason : This is because, an artifical pacemaker is capable of stimulating the heart electrically to maintain its beats.

Assertion : Materials are exchanged between epithelial and connective tissues by diffusion. Reason : Blood vessels are usually absent in epithelial tissue

Read the assertion and reason carefully to mark the correct option out of the options given below: (a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion (c) If the assertion is true but the reason is false (d) If both the assertion and reason are false (e) If the assertion is false but reason is true Assertion : Heart valves resemble swing doors in action Reason : Valves are present in the heart chamber, at the opening of the heart into large arteries and veins.

Assertion: Parenchyma and collenchyma tissues act as mechanical tissue to plants. Reason: Parenchyma and collenchyma form an important part of the bark of trees.

Assertion. Pancreas is a heterocrine gland. Reason. Pancreas consists of exocrine as well as endocrine tissue.

Assertion :- Pituitary gland is ectodermal in origin Reason:- Both parts of pituitary develop from nervous tissue

Assertion: In plants differentiation is open. Reason: Cells or tissues ansmg out of the same meristem have different structures at maturity.