BIO1111 Drchid seeds are tiny, with virtually no endosperm and with minuscule co
ID: 209000 • Letter: B
Question
BIO1111 Drchid seeds are tiny, with virtually no endosperm and with minuscule cotyledons. If such seeds are dep na dark moist environment, then which of these represents the most likely means by which a fungus might a in seed germination, given what the seeds lack? A) by transferring some chloroplasts to the embryo of the seed. B) by providing the seeds with water and minerals. C) by providing the embryos with some organic nutrients the fungi might have absorbed D) by strengthening the seed coat that surrounds each seed 17)Which of the following is the most important role for fungi in the carbon cycle? A) Fungi help release fixed carbon back to the environment for other plants and photosynthetic organism to utilize B) Fungi's main role is to provide already fixed carbon to plants for the production of plant cellular t C) Fungi fix carbon by undergoing photosynthesis D) Fungi reduce atmospheric carbon dioxide. h of these time intervals, based on plant fossils, came second? A) extensive growth of gymnosperm forests B) Silurian-Devonian explosion with fossils of plant lineages that contain most of the major morphological innovations C) rise and diversification of angiosperms D) carboniferous swamps with giant horsetails and lycophytes 19.) How could you most easily determine if a plant is heterosporous? A) It produces bisexual gametophytes B) It produces pollen. C) It has vascular tissue. D) Its diploid sporophyte produces spores via meiosis. 20.) Which of these is a major trend in A) the trend toward producing 8) the trend toward a gametophyte-dominated life cycle C) the trend toward a sporophyte-dominated life cycle may be plant L)An tinerate paleontologist goes back in time to the Early Devonian Period and discovers an interesting wing the following characteristics: 1) stems8 to 12 nches tall 2) a tough surface cuticle 3) tiny pores (stomata) 4) sporangia You would expect this plant to have: a) pollen b) naked seeds c) flagellated sperm d) endosperm paleontologist next fast forwards to the Mid-Cretaceous Period and while ducking attacks by huge he discovers another plant showing these characteristics 1) pollen cones 2) rancid smelling fleshy seeds 3) lobed leaves You would expect this plant to show A) flowers B) double fertilization C) D) naked seeds AM 2 Spores andExplanation / Answer
16. Option C is correct.
Orchids seeds contain immature embryo that lacks shoot and root meristems. It does not contain nutritional support required to grow on its own. It gets nutrients from outside sources such as mycorrhiza which supply nutrients.
17. Option A is correct.
Fungi help to recycle carbon back into the ecosystem (this is done by saprophytic fungi)
18. Option B is correct.
The Silurian-Devonian explosion is the second major interval in the fossil record of land plants.
19. Option A is correct.
A heterosporous plant produces two types of gametophytes.
20. Option C is correct.
There is a gradual shift towards dominant sporophytic generation in land plants.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.