MCQ
Fluid mosaic model of cell membrane was put forward by:
- ADanielli and Davson.
- ✓Singer and Nicolson.
- CGarner and Allard.
- DWatson and Crick.
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$(a)$ It is also called as the earlywood
$(b)$ In spring season cambium produces xylem elements with narrow vessels
$(c)$ It is lighter in colour
$(d)$ The springwood along with autumnwood shows alternate concentric rings forming annual rings
$(e)$ It has lower density
Choose the correct answer from the options given below:
$I.$ Leafy stage is produced from the secondary protonema as a lateral bud
$II.$ They consist of upright, slender axes bearing spirally arranged leaves
$III.$ They are attached to the soil through multicellular rhizoids
$IV.$ This leafy stage bears the sex organ
Which of the statements given above are correct?
$\begin{array}{|l|l|} \hline Column\,\,-I & Column\,\,-II \\ \hline A.\,\,PRL & 1.\,\,Gonadotropin \\ \hline B.\,\,TSH & 2.\,\,Glucocorticoid \\ \hline C.\,\,ACTH & 3.\,\,Thyroid\,\,hormone \\ \hline D.\,\,LH\,\,and\,\,FSH & 4.\,\,Mammary\,\,glands \\ \hline \end{array}$