1. Gymnosperms used to dominate the natural landscapes in the early (Triassic) and middle (Jurassic) Mesozoic era. However, today, in countries like Botswana they do not exist naturally. Based on their characteristics, explain at least 3 reasons why they have disappeared in these area and many other parts of the world.

1. Gymnosperms used to dominate the natural landscapes in the early (Triassic) and middle (Jurassic) Mesozoic era. However, today, in countries like Botswana they do not exist naturally. Based on their characteristics, explain at least 3 reasons why they have disappeared in these area and many other parts of the world.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter28: Seedless Plants

Section: Chapter Questions

Problem 6TYK: In addition to having simple vascular tissue, seedless vascular plants differ from all bryophytes in...

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Which of the following traits characterizes gym nosperms? The plants carry exposed seeds on modified leaves Reproductive structures are located in a flower After fertilization, the ovary thickens and forms a fruit The gametophyte is the longest phase of the life cycle.
Which of the following traits characterizes gymnosperms? a. The plants carry exposed seeds on modified leaves. b. Reproductive structures are located in a flower. c. After fertilization, the ovary thickens and forms a fruit. d. The gametophyte is longest phase of the life cycle.
Which feature(s) do ferns share with all other land plants? a. sporophyte and gametophyte life cycle stages b. gametophytes supported by a thallus c. dispersal of spores from a sorus d. asexual reproduction by way of gemmae e. water uptake by means of rhizoids.
A scientist sequences the genome of Chara, red algae, and a tomato plant. What result would support the conclusion that Charophytes should he included in the F’/amae kingdom? The Chara genome is more similar to the red algae than the tomato plant All three genomes are distinctly different The Chara genome is more similar to the tomato plant genome than the red algae genome The tomato plant genome is distinct from the red algae genome.
In which of the following geological periods would gymnosperms dominate the landscape? Carboniferous Permian Triassic Eocene (present)
What is the ploidy of the following structures gametophyte, seed, spore, sporophyte? 1n, 1n, 2n, 2n 1n, 2n, 1n, 2n 2n, 1n, 2n, 1n 2n, 2n, 1n, 1n
Give some examples of bryophyte features that bridge aquatic and terrestrial environments.
Which is the correct matching of phylum and plant group? a. Hepatophyta: liverworts b. Anthocerophyta: mosses c. Bryophyta: horsetails d. Lycophyta: ferns e. Monilophyta: hornworts
Which of the following features does not support the inclusion of Charophytes in the Plantae kingdom? Charophyte chloroplasts contain chlorophyll a and b Charophyte plant cell walls contain plasmodesmata to allow transfer between cells within multicellular organisms Charophytes do not exhibit growth throughout the entire plant body Charophytes are multicellular organisms that lack vascular tissue.
The following structures are found on the underside of fern leaves and contain sporangia: sori rhizomes megaphylls microphylls
The dominant organism in fern is the sperm spore gamete sporophyte
Figure 24.17 Which of the following statements is true? A basidium is the fruiting body of a mushroom-producing fungus, and it forms four basidiocarps. The result of the plasmogamy step is four basidiospores. Karyogamy results directly in the formation of mycelia. A basidiocarp is the fruiting body of a mushroom-producing fungus.