FREE NEET Biology Practice MCQ Test: Anatomy Of Flowering Plants Exercise 2 Questions Answers With Detailed Explanations [PDF]

Answer: (c)

Answer: (b)

Answer: (b)

Answer: (b)

Answer: (c)

Answer: (d)

Answer: (d)

A bicollateral vascular bundle is characterised by xylem being sandwiched between phloem. Here there are two cambium rings e.g., Cucurbita.

Answer: (a)

Answer: (b)

Answer: (a)

Answer: (c)

Answer: (a)

Answer: (b)

Two bands of secondary xylem i.e., autumn wood and spring wood are produced in one year. These two bands make an annual ring. The age of the plant can be determined by counting the annual rings. It is called dendrochronology.

Answer: (d)

Lenticels are lens shaped openings formed in bark due to secondary growth. They permit gaseous exchange in woody trees. They also contribute to transpiration but in minute amounts because the suberised complementary cells present beneath the pore prevent excessive water loss.

Answer: (a)

Apical meristems are situated at the tips of the root and shoot. They take part in initial growth. Plants elongate and increase in height as a result of divisions in this meristem. Promeristem and primary meristem (root and shoot apices) are included in this type of meristem.

Answer: (c)

In monocot leaves, the mesophyll cells are undifferentiated.

Answer: (d)

Answer: (a)

Answer: (d)

In the given figure of T.S of dicot root, the parts marked as A, B, C, D, E and F are respectively cortex, epiblema, pith, endodermis, root hairs and pericycle. Dicot root consists of a single layer of epiblema which bears unicellular root hairs. Endodermis is followed by one or more layers of pericycle. Inner to pericycle lies radially arranged vascular bundles. This arrangement keeps the xylem bundles in direct contact with the outer tissue of the roots which conduct water absorbed by root hairs to the inside. Xylem is exarch.

Answer: (c)

Dedifferentiation is the phenomenon of regeneration of permanent tissue to become meristematic. Cork cambium, wound cambium and interfascicular vascular cambium are the examples of secondary meristems which are always produced through dedifferentiation.