Question

Which of the following unicellular algae reproduce by auxospores, have a silicified cell wall and store food in the form of fats, leucosin and chrysolaminarin?
A. Diatoms
B. Yellow green algae
C. Dinoflagellates
D. Euglenoids

Answer 1

Algae are green in color. Algae are used as food in various parts of the world. It belongs to the plant kingdom. Lichens are the association of algae and fungi. Algae are a large group of eukaryotic organisms. Certain algae have the ability to clean the environment. They are mostly aquatic and photosynthetic organisms.

Complete answer:
Option A: Diatoms- diatoms are marine algae which lie deep inside the ocean in the sea bottom. Diatoms have cell wall which are silica rich and they reproduce by asexual reproduction. By spore formation like-auxospores. And also, they store food in the form of lipid content.
Option A is the correct answer.
Option B: Yellow green algae- yellow green algae are habitants of freshwater and they are also found in soil. They belong to class Xanthophyta.
Option B is not the correct answer.
Option C: Dinoflagellates- dinoflagellates are found in deep water, mostly marine and they are single celled organisms.
Option C is not the correct answer.
Option D: Euglenoids- euglenoids do not belong to group algae. They are planktons and they are abundant in organic materials. Some euglenoids are marine.
Option D is not the correct answer.

So, Option A is the correct answer.

Note:
As we discussed algae and its different forms which are present in diversity. animals are not present in earth from history or something they have evolved from cosmic particles. The history of life forms and their growth is studied under the term called evolution. Evolution is a concept where all life forms are categorized according to their days on earth, determining how old they are.