Question

The dominant plant groups of cenozoic era is
A. Ancient bacteria
B. Algae, Protista, ferns
C. Seed bearing plants
D. Flowering plants

Answer 1

Hint: Cenozoic era is also known as ‘The age of mammals’. During this period, many smaller species were allowed to thrive and diversity as their predators vanished during this period. Since the extinction of many groups of giant mammals took place during this period it is known as the age of mammals.

Complete answer:
The cenozoic era is divided into two periods,
i) Paleogene
ii) Neogene

The cenozoic era is basically the third of the major eras in the history of Earth and it started around 66 million years ago and is extended till the present . During this period, the continents were formed and even Earth’s flora and fauna evolved to what they look like right now in the present time.
The dominant plant group of the Cenozoic era is flowering plants. Flowering plants form the most diverse group of land plants. Flowering plants are also known as the angiosperm plant. The

Characteristics of angiosperms are:
i) All plants have flowers at some point of their life
ii) The flower has stamens or microsporophyll and carpels or megasporophyll
iii) The ovules are enclosed in the ovary which is present at the base of the megasporophyll
iv) The sporophytes are diploid in nature
v) The carpels consists of developing seeds which may develop into a fruit
vi) Fertilization is quicker in angiosperms and the production of seeds is also quicker
vii) They can survive is a wide range of habitats

Therefore, from above explanation the correct option is (D) Flowering plants.

Note: Angiosperms are classified into two types,
i) Monocot - They have single cotyledon and have adventitious roots. The leaves are simple and have parallel venation. Examples include sugarcane, banana, etc.
ii) Dicot - they have two cotyledons and have tap roots. The leaves have reticulate venation. Examples include tomatoes, sunflower, etc.