Question 1

Who proposed the natural system of classification for flowering plants?

Accepted Answer

George Bentham and J.D. Hooker proposed the natural system of classification for flowering plants, which is based on natural affinities among the organisms and considers external as well as internal features like ultrastructure, anatomy, embryology, and phytochemistry.

Question 2

Numerical taxonomy is based on:

Accepted Answer

Numerical taxonomy is based on all observable characteristics. It is carried out using computers, where numbers and codes are assigned to all characters and the data are processed equally.

Question 3

Algae reproduce asexually most commonly by the formation of which type of spores?

Accepted Answer

Algae reproduce asexually by the formation of various types of spores, the most common being zoospore. Zoospores are flagellated and motile.

Question 4

Which of the following pigments is responsible for the characteristic brown color of Phaeophyceae?

Accepted Answer

Fucoxanthin is the carotenoid pigment responsible for the brown color of members of Phaeophyceae (brown algae), along with chlorophyll a and c.

Question 5

Red algae are red due to the abundance of which pigment?

Accepted Answer

Red algae (Rhodophyceae) appear red due to the dominance of the red pigment r-phycoerythrin in their body along with chlorophyll a and d.

Plant Kingdom — MP Board Class 11 Biology Important Questions & Revision Notes