Question

Euglena, Nostoc, Chlorella and Spirogyra. Choose the correct option regarding mentioned organisms in
the question
1. All are unicellular eukaryotes
2. All are autotrophic multicellular
3. All have chlorophyll'a' and photosynthetic ability 4. All are belong to green algae​

Answer 1

Answer:

A is a correct answer for your question

Answer 2

Answer:

3. All have chlorophyll'a' and photosynthetic ability.

is the correct answer.

Explanation:

• Euglena is both autotrophs as well as heterotrophs.It can engulf amoeba and other green algae and it can also prepare food with the help  of chloroplast present in the body of cell.
• Chlorella and spirogyra both are green algae which belongs to class Chlorophyceae.They both have Chlorophyll a and chlorophyll b which helps them in photosynthesis.Chlorophyll b abosrbs light blue light of high frequency for use in photosynthesis and chlorphyll a works as an electron donor in ETS(Electron Transport Chain).
• Nostoc has chlorophyll as well as two pigment blue phycocyanin and red phycoerythrin.As it have chlorophyll so it also has the ability of photosynthesis.Nostoc can also fix the nitrogen with the help of  Heterocyst.

Since all have chlorophyll and phtosynthetic ability so option 3 is correct.