Question

Chief anatomical feature of cucurbitaceae family is
A. Bicollateral vascular bundles
B. Conjoint vascular bundle
C. Radial vascular bundle
D. none of these

Answer 1

Hint: Cucurbitaceae is dioecious or monoecious plants which have one tendril per node and thee leaves are simple, they are widely distributed and majorly found in tropical region of the world, economically important food crop such as water melon, melons, cucumber.

Complete answer:
The cucurbitaceae are also known as gourd family, which are flower bearing plants. The characteristic feature of this cucurbitaceae plant family is the presence of bicollateral vascular bundle anatomical features. The phloem is present external and internal to the xylem on the same radius. The outer phloem present and remain near the periphery of cylinder and inner phloem present near the center.
B. Conjoint vascular bundle :- It shows the arrangement of vascular bundle xylem and phloem together in the same radius. Such bundles are found in stems and leaves. In this type of vascular bundle arrangement xylem is present in the interior side and phloem is present toward the exterior side, named as adaxial and abaxial respectively. This type of arrangement is divided into three subtypes.
C. Radial vascular bundle :- It is the simple type of arrangement of vascular bundle xylem and phloem which are separated by non- conductive tissue. Such type of arranged vascular bundle found in monocot and dicot plant roots. When the vascular tissue shows patches of appearance and occupies different radii is known as radial vascular bundle.

So, the correct answer is option A

Note: In plants two types of vascular tissue are found that are named as xylem and phloem. Such tissues conduct various mineral nutrients and water. Food nutrients such as sugar are transported by the phloem tissue from leaves to the whole body part, while xylem transport water and water dissolve nutrients from root to all body parts of the plant.