7
Question
Velamen is needed for
Velamen is needed for
Open in App
Solution
The correct option is C Absorption of moisture
Velamen is a spongy, multiple epidermis that covers the roots of some epiphytic or semi-epiphytic plants. The velamen of an orchid is the white or gray covering of aerial roots. It is many cell layers thick and capable of absorbing atmospheric moisture and nutrients. The velamen also serves a mechanical function, protecting the vascular tissues in the root cortex, shielding the root from transpirational water loss and in many cases, adhering the plant to the substrate. The velamen arises from the root tip by division of a special tissue. The dead cells of velamen diffuse light, thus giving it a grey appearance except at the tips, where the chlorophyll become visible. Upon absorbing water, the dead cells become transparent and the whole velamen tissue then appears green.
Thus, the correct answer is option C.
Velamen is a spongy, multiple epidermis that covers the roots of some epiphytic or semi-epiphytic plants. The velamen of an orchid is the white or gray covering of aerial roots. It is many cell layers thick and capable of absorbing atmospheric moisture and nutrients. The velamen also serves a mechanical function, protecting the vascular tissues in the root cortex, shielding the root from transpirational water loss and in many cases, adhering the plant to the substrate. The velamen arises from the root tip by division of a special tissue. The dead cells of velamen diffuse light, thus giving it a grey appearance except at the tips, where the chlorophyll become visible. Upon absorbing water, the dead cells become transparent and the whole velamen tissue then appears green.
Thus, the correct answer is option C.
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
