Hots Questions
5 min read

Plant Kingdom

- Sharpen the thinking skills by attempting the given HOTS
Cycas is known as 'relic of past'. Why so? Check the given question to get the answer.
Short Answer.
Each plant or group of plants has some phylogenetic significance in relation to evolution: Cycas, one of the few living members of gymnosperms is called the 'relic of the past'. Can you establish a phylogenetic relationship of Cycas with any other group of plants that justifies the above statement? 
Can you identify the division of kingdom Plantae by a list of characteristics of a particular plant? Check the given question.
SrCharactersPlant group IPlant group IIPlant group IIIPlant group IV
 3.Presence of vascular tissueNoYesYesNo
 4.Flower producedNoNoYesNo
Shirin had been on a holiday to Ooty. In her school, she has studied the interesting world of plants. On the day of her return, she collected four groups of plants I, II, III, and IV. She carefully noted some of their details and arranged the information in the form of a table as given below. She asked her teacher how to identify which group is of pteridophytes. Take a look at the data and suggest which of the groups could be of Pteridophytes and why?
Plant group I
Plant group II
Plant group III
Plant group IV
Angiosperms are the most abundant plants on this earth. They posses a unique feature, double fertilization. How do you think, the success of angiosperms is can be attributed to double fertilization?
How is double fertilization significant to angiosperms and how has this event led to the successful evolution of angiosperms?
A member of plant kingdom has the dominant, free-living, photosynthetic gametophyte phase. Can you identify the ploidy of cells and type of life cycle for this member? The given question can have an answer.

A multicellular, filamentous alga exhibits a type of sexual life cycle in which meiotic division occurs after the formation of the zygote. The adult filament of this alga has:
Haploid vegetative cells and diploid gametangia
Diploid vegetative cells and diploid gametangia
Diploid vegetative cells and haploid gametangia
Haploid vegetative cells and haploid gametangia
Gymnosperms and angiosperms are the two plant divisions that possess seeds. So do you think, double fertilization will be possible in gymnosperms also?
Why is double fertilization not observed in gymnosperms despite them being seeded plants?