Biology
Assertion (A): Blood and lymph, both contain the same fluid (plasma) but they differ from each other in their cellular contents.
Reason (R): Blood contains red blood cells and platelets whereas lymph contains only white blood cells.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Answer
Both A and R are true and R is the correct explanation of A.
Reason — A is true as blood and lymph both contain a fluid component (plasma in blood and lymph fluid derived from plasma), but they differ in cellular composition.
R is true as blood contains RBCs, WBCs, and platelets, whereas lymph mainly contains WBCs (especially lymphocytes) and lacks RBCs and platelets.
The difference in cellular contents directly explains why blood and lymph are distinct despite having similar fluid origins.
Therefore, Both A and R are true and R is the correct explanation of A is the correct option.
Related Questions
Assertion (A): Permanent tissues form the bulk of the plant body and they do not divide.
Reason (R): Permanent tissues mature into fixed, specialised cells that carry out specific functions, so they no longer retain the ability to divide.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): All organisms, whether unicellular or multicellular, start their life from a single celled structure called the zygote.
Reason (R): Zygote is formed by the fusion of two unicellular structures (gametes) during the process of fertilization among higher plants and animals.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Epithelial tissues form a protective covering of cells, found only on the outer surface of the body.
Reason (R): Epithelial tissues are also found around internal organs, line inner body surfaces and perform various functions like absorption, secretion, etc.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
State whether the following statement are True or False.
(i) A tissue is formed of only one type of cells.
(ii) Only one type of tissue forms an organ.
(iii) Permanent tissue is made up of undifferentiated and dividing cells.
(iv) Meristematic tissue is found at the growing tips of a plant.
(v) Phloem is formed of dead tubular cells.