STD 11 - 13. Plant growth and development — NEET STD 11 Science — Question

Vascular bundle is closed, when

Which characters for secondary growth are incorrect from given characters ?
(i) The cells of cambium cut off towards pith, mature into secondary phloem and the cells cut off towards periphery mature into secondary xylem.
(ii) The vascular cambium is generally more active on the outer side than on the inner.
(iii) The primary and secondary phloems get gradually crushed due to the continued formation and accumulation of secondary xylem.
(iv) The primary xylem however remains more or less intact, in or around the centre.
(v) At some places, the cambium forms a narrow band of parenchyma, in the radial directions called secondary medullary rays.

The maturation of male (anthers) and female (stigma) structures at different times in the same flower (in order to reduce the possibility of self pollination) is called

New Wild Life Protection Act was passed in:

Statement-I- In haemophilia a single protein that is a part of the cascade of proteins involved in the clotting of blood is affected.
Statement - II- Thalassemia can be classified according to which chain of the haemoglobin molecule is affected.

Certain chemical substances having profound effect on growth, are called

The ripening of fruits can be fastened by treatment with

The casparian strips of root endoderm is contain a mixture of

In a dicot stem, the interfascicular cambium strip arises