Question

Underground epidermal cells may have the exterior cell wall

extended into a long, thin thread-like structure called
_____?
A A secretory cell
B a root hair
C lenticels
D cuticle
E a glandular hair

Answer 1

The underground epidermal cells extend into thread-like structures called root hairs, which increase the root's surface area for absorbing water and minerals.

Step-by-step explanation:

Underground epidermal cells may have the exterior cell wall extended into a long, thin thread-like structure called a root hair. Root hairs are extensions of root epidermal cells that greatly increase the surface area for water and mineral absorption. While other options like cuticle and glands are also associated with the epidermis, they do not form the thread-like structures essential for increasing surface area for absorption in roots.