Context: The dominant land plant species of the time were gymnosperms, which are vascular, cone-bearing, non-flowering plants such as conifers that produce seeds without a coating. This is opposed to the earth's current flora, in which the dominant land plants in terms of number of species are angiosperms. One particular plant genus, Ginkgo, is thought to have evolved at this time and is represented today by a single species, Ginkgo biloba. As well, the extant genus Sequoia is believed to have evolved in the Mesozoic.

Question: What was the dominant plant species of the Mesozoic?
Answer: gymnosperms

Question: What is an example of a gymnosperm?
Answer: conifers

Question: What are the dominate plant species on Earth now?
Answer: angiosperms

Question: When did the Ginkgo evolve?
Answer: Mesozoic

Question: What famous tree species is believed to have evolved during the Mesozoic?
Answer: Sequoia

Question: What plant species died out in the Mesozoic?
Answer: Unanswerable

Question: Ginkgo species died out in what period?
Answer: Unanswerable

Question: What are the most at risk species on Earth now?
Answer: Unanswerable

Question: What land species died out in this period?
Answer: Unanswerable