Biology

Biology, 28.07.2019 14:30, froyg1234

Is the possession of flagellated sperm a primitive or advanced characteristic in the plant kingdom?

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Biology, 01.07.2019 18:30, kell22wolf

Which feature of cycads distinguishes them from most other gymnosperms? use the information to answer the following question. the cycads, a mostly tropical phylum of gymnosperms, evolved about 300 million years ago and were dominant forms during the age of the dinosaurs. though their sperm are flagellated, their ovules are pollinated by beetles. these beetles get nutrition from the pollen and shelter from the microsporophylls. upon visiting megasporophylls, the beetles transfer pollen to the exposed ovules. in cycads, pollen cones and seed cones are borne on different plants. cycads synthesize neurotoxins, especially in the seeds, that are effective against most animals, including humans. which feature of cycads distinguishes them from most other gymnosperms? they have exposed ovules. they have flagellated sperm and they are pollinated by animals. they are pollinated by animals. they have flagellated sperm.

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Biology, 29.08.2019 21:30, sherifour

What could happen to the reproductive process of mosses during a drought? a)mitosis in the sporophyte would cease and the reproductive cycle would stop. b)meiosis in the sporophyte would cease and the reproductive cycle would stop. c)the flagellated sperm would not be able to swim to the eggs for fertilization. d) the flagellated sperm and eggs would go dormant until water was available.

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Biology, 23.10.2019 03:50, aliciabrown73

Abotanist discovers a new species of plant in a tropical rain forest. investigation of its anatomy and life cycle shows the following characteristics: flagellated sperm, xylem with tracheids, separate gametophyte, and sporophyte generations with the sporophyte dominant, and no seeds. this plant is probably most closely related to

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Biology, 25.10.2019 03:43, zahrast14

Abotanist discovers a new species of plant in a tropical rain forest. after observing its anatomy and life cycle, he notes the following characteristics: flagellated sperm, xylem with tracheids, separate gametophyte and sporophyte generations with the sporophyte dominant, and no seeds. this plant is probably most closely related to a) flowering plants. b) mosses. c) charophytes. d) gymnosperms. e) ferns.

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