How are 'non-green' forms of algae clubbed together with the green chlorophyllous algae in the same plant kingdom division?
All of the above
Both brown and red algae contain chlorophyll a, which carry out photosynthesis in them, similar to green algae. All of them, also share similar physiology, food sources and have high structural similarity. Therefore, green, red and brown algae are grouped together in the division Thallophyta.