Answer: Both groups are mainly photosynthetic with components in their cell covering.
- A Both groups are mainly photosynthetic with components in their cell covering
- B Both groups feed as heterotrophic decomposers breaking down dead organic matter
- C Both groups pass through an aggregated plasmodium stage during their life cycle
- D Both groups completely lack any form of protective cell covering
Correct answer: A. Both groups are mainly photosynthetic with components in their cell covering
Explanation: Chrysophytes (diatoms, golden algae) and dinoflagellates are largely photosynthetic, with characteristic coverings (frustule in diatoms, cellulose plates in dinoflagellates), unlike slime moulds, which are heterotrophic saprophytes that engulf decaying matter.
Whittaker's five-kingdom system (1969) groups all cellular life by cell structure and nutrition; viruses, viroids, and lichens fall outside this system entirely since they aren't independently classifiable as one of the five.
Concept context
Whittaker's five kingdom system covering Monera, Protista, Fungi, plus viruses, viroids, and lichens. A foundational NEET chapter on how living organisms are grouped.