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Anonymous users2024-02-09Chlamydomonas reproduce asexually to produce zoospores; Sexual reproduction is homogamous, heterogamous, and ovarian reproduction.
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Anonymous users2024-02-08Chrysanthemum bar. Algae are spores.
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Anonymous users2024-02-07Answer B Plants are divided into seed plants and spore plants according to whether they reproduce offspring with seeds, ginkgo biloba and cycad cong fiber are gymnosperms among seed plants, and Hengfang wheat, chrysanthemum, and peony are angiosperms among Zheng barren plants.
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Anonymous users2024-02-06Most of the plants in nature are diverse, according to the presence or absence of plant seeds and the different modes of reproduction, the wide bucket plant is generally divided into seed plants and spore plants, seed plants reproduce offspring with seeds, and seed plants include gymnosperms and angiosperms; Spore plants do not produce seeds, and use spores to reproduce offspring, spore plants include algae plants, bryophytes and ferns A kidney fern belongs to ferns, while bc corn and sunflower belong to angiosperms, d Ginkgo biloba belongs to gymnosperms It can be seen that potato shouting A is in line with the theme
So choose A
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Anonymous users2024-02-05Algae plants, bryophytes and ferns do not produce seeds, but they can produce spores in the annual wheel, and they belong to spore plants
So the answer is: moss; Fern.
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Anonymous users2024-02-04A. Ginkgo biloba belongs to the gymnosperm plant du, the genus Wheat spp.
In angiosperms, both are propagated by seed to reproduce offspring a wrong; Nei B, Manjianghong and Nephrorong Fern all belong to ferns, and use spores to reproduce offspring, which belong to spore plants b correct;
c. Cycads belong to gymnosperms, peanuts belong to angiosperms, and both use seeds to reproduce offspring Belong to seed plants c False;
d. Peonies and chrysanthemums both belong to angiosperms, and they are both propagated by seeds d Wrong Therefore, b
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Anonymous users2024-02-03Answer C Huyinna hail is a bryophyte that uses spores to reproduce offspring, and Minchao a, b, and d belong to seed plants, and Fengfan uses seeds to propagate offspring.
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Anonymous users2024-02-02Plants in nature are diverse, according to the presence or absence of plant seeds and the different modes of reproduction, plants are generally divided into seed plants and spore plants, seed plants use seeds to reproduce offspring, seed plants include gymnosperms and angiosperms; Spore plants do not produce seeds, but use spores to reproduce offspring, spore plants include algae plants, bryophytes and ferns A kidney fern all belong to ferns, while bc corn and sunflower belong to angiosperms, d Ginkgo biloba belongs to gymnosperms It can be seen that a is in line with the topic
So choose A
Houseplants that do not need to bask in the sun are as follows:1. Evergreen: It likes a shady environment and can grow well without basking in the sun. >>>More
Because the composition of the medium in tissue culture is determined by different plant species, it is necessary to prepare targeted medium in order to achieve better results in tissue culture, and these are to be explored and studied. Some cherished plants due to a variety of special reasons, their survival rate is very low, and some plants must also survive in a specific environment and climate (symbiotic bacteria, cooperation with animals, cooperation with other plants, some special trace elements, a certain air humidity, etc. are all limiting conditions), once transplanted to other places it is difficult to survive, so the requirements of environmental conditions have increased the difficulty of tissue culture. The use of tissue culture to propagate endangered plants is not unused, but scientists have been experimenting with it and several have been successful, as if Metasequoia metasequoia was once a good example of success with tissue culture.
The plant weighs 2g 5g sample (accurate to g, according to the content of lead and cadmium), cuts it, puts it in a porcelain crucible, first carbonizes it on an adjustable electric heating plate over low heat until it is smokeless, moves it into the muffle furnace 500 25 ash for 1h, cools, dissolves the ash with mol l nitric acid, washes the sample digest into (without filtration) 100 ml volumetric flask with a dropper, washes the porcelain crucible with a small amount of water for many times, and the lotion is combined in the volumetric flask and fixed to the scale, mixed well and set aside. >>>More
Screen. Shapes: ring, thread, trapezoid, reticulated and perforated.
Choose B because mimosa is a plant, and the closed leaves are stressful and do not consume ATP