Question

The main difference between the biennials and perennial plants is that the perennials
A. Are tree species.
B. Do not die after the seasonal production of fruits.
C. Invariably show an asexual reproductive structure.
D. Always have an underground perennating structure.

Answer 1

The biennials and perennials plants can be differentiated from each based on their life cycle. One of them completes its life cycle i.e. germination, growing, flowering in $2$ years and another’s life cycle continues for more than two years.

Step by step answer: The main difference between the biennials and perennial plants is that the perennials do not die after the seasonal production of fruits.
Plants can be divided into three categories based on their life span:-
i. Annuals: These plants germinate, grow, flower, give seed, and die within one year. This type of plant completes all stages of life within $1$ year. The plant dies after giving seed. This type of plant is generally used in agriculture. e.g. Peas, Maize
ii. Biennials: These types of plants complete all stages of life within $2$ years most of these germinate and grow in one year and flower and give seed in the second year plant die after giving seed. e.g. carrot, hollyhock.
iii. Perennials: This type of plant has a life span of more than $2$ years. These plants initially grow for several years and after attaining certain growth they produce flower and seed one or for many years. The plant does not die after producing seed. e.g. Mango, Apple
Additional information: The life cycle of an annual can be shorter than one month similarly the life cycle of biennials can be more than $2$ years. Scientists have developed many crop species of a shorter life span of $4 - 6$ months e.g. wheat. The annuals and biennials generally are herbs and shrubs while perennials are the tree.

Note: All three types of plants, annuals and biennials, and perennials are differentiated from each other based on their life span. The annuals and biennials do not grow much vegetatively as they have completed their life span in a shorter period, whereas perennials grow vegetatively and then enter into the reproductive stage.