MCQ
Choose the correct pair.
- AHippocampus – 3-chambered heart.
- BRana – 2-chambered heart.
- CCrocodilus – 4-chambered heart.
- DPavo – 3-chambered heart.
Explanation:
Hippocampus (seahorse) belongs to class Osteichthyes. It has 2-chambered heart (one auricle and one ventricle). Rana (frog) belongs to class Amphibia. It has a 3-chambered heart (two auricles and one ventricle). Crocodilus (crocodile) belongs to class reptilia. It is an exception in reptiles. Pavo (peacock) belongs to class aves. It has 4-chambered heart.
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$\begin{array}{|l|l|} \hline Column\,\,-I & Column\,\,-II \\ \hline A.\,\,PRL & 1.\,\,Gonadotropin \\ \hline B.\,\,TSH & 2.\,\,Glucocorticoid \\ \hline C.\,\,ACTH & 3.\,\,Thyroid\,\,hormone \\ \hline D.\,\,LH\,\,and\,\,FSH & 4.\,\,Mammary\,\,glands \\ \hline \end{array}$
$R$ : Both develop from same mother cell.