MCQ
Blood leaving lungs is rich in
- ✓Oxygen
- BHaemoglobin
- CCarbon dioxide
- DMore number of $RBC$
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| Column-l | Column-II |
| A. Trophoblast | i. Embedding of blastocyst in the endometrium |
| B. Cleavage | ii. Group of cells that would differentiate as embryo |
| C. Inner cell mass | iii. Outer layer of blastocyst attached to the endometrium |
| D. Implantation | iv. Mitotic division of zygote |
Choose the correct combination for $A$ and $B$
$(I)$ $RBCs$ are formed in the white bone marrow in adults.
$(II)$ $RBCs$ have red colour because presence of protein called haemoglobin.
$(III)$ Nucleus is present in $RBC$ in most of the mammals and are biconcave in shape.
$(IV)$ A healthy individual has $12 -16\, gms$ of haemoglobin in every $1000\, ml$ of blood.