Question

Annual rings can be useful for indicating the age of the tree
(A)Dicot of the equatorial region
(B)Monocot of the equatorial region
(C)Dicot of temperate region
(D)Monocot of temperate area

Answer 1

Hint: The age of those plants is predicted by using annual rings that grow in the region where there are maximum seasonal variations seen in environmental conditions and undergo secondary growth. This scientific method is known as Dendrochronology.

Complete answer:
In the Dicot of temperate regions, two varieties of secondary xylems are formed, spring or earlywood and autumn wood or latewood. These two varieties of wood together form into a circle or ring of wood called annual rings.

Additional Information: New growth in trees occurs during a layer of cells near the bark. A tree's rate of growth changes during a predictable pattern throughout the year in response to seasonal climate changes, leading to visible growth rings. Each ring marks an entire cycle of seasons, or one year, within the tree's life.
Horizontal cross-sections traverse the trunk of a tree that can reveal growth rings, also mentioned as tree rings or annual rings. Growth rings result from new growth within the vascular cambium, a layer of cells near the bark that botanists classify as a lateral meristem; this growth in diameter is understood as secondary growth.
Dendrochronology has many applications and uses. Dates from dendrochronology are often used as a calibration and check of carbon dating
So, the correct answer is ‘Dicot of the temperate region’

Note: On the basis of a different season, the rate of cambial activity changes due to which rings are produced in an alternate manner like narrow and then wide. The darker wood is mostly formed during summers and lighter rings in winters.