Topic 4 Study Questions:Endosymbiosis

Question 1

Using diagrams, describe the general features of primary,
secondary and tertiary endosymbiosis.

Question 2

What form of endosymbiotic process must have taken place if a
chloroplast in a modern algal cell appears enclosed by only 2
membranes? What if it is enclosed by more than 2 membranes?

Answer 2

If it is enclosed by more than membranes than you it must be from secondary endosymbiosis

If it has 2 or less than 2 than you would assume it is from primary endosymbiosis but the membranes can be lost so you cant say with certainty

Question 3

What level of endosymbiosis are most algae derived from?

Answer 3

secondary

Question 4

What is a nucleomorph?

Answer 4

This is the remnant of the nuclei of red or green algal symbionts
Evidence of secondary endosymbiosis

Question 5

Product of Primary Endosymbiosis

Answer 5

Red and green algae
Glacophytes

Question 6

Product of Secondary Endosymbiosis

Answer 6

Euglenoids
Cryptomonads
Haptophytes
Photosynthetic stramenopiles
Some dinoflagellates
Chlorarachniophytes
Apicomplexans