guardianship
发表于 2025-3-25 05:35:37
Heinrich Walter,Siegmar-W. Breckleon. The fresh-water species are all colonial, and perhaps several hundred of the individual ‘polyps’ are found aggregated together. The individuals look superficially like Hydras, but further investigation shows that they are very different and much more complex (Fig. 190A). The members of a colony
epicondylitis
发表于 2025-3-25 09:38:21
The Competitive Factor and Root Competition,in gutters to large lakes. All the species are microscopic, though the larger ones, which may be 2 mm. long, are visible to the naked eye as small whitish or pinkish bodies. In spite of their small size they have a complicated structure, and are made up of many different kinds of cells. They have al
NUDGE
发表于 2025-3-25 12:43:47
,Succession—Climax—Zonal Vegetation,(i.e. one . and the . under its control) are Protozoa. It is difficult, however, to give a simple definition which describes all the forms which are contained in the group for two reasons. First, because there are some members with complicated bodies and several nuclei; these, however, are not truly
cogent
发表于 2025-3-25 19:32:10
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Compass
发表于 2025-3-25 23:03:30
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符合国情
发表于 2025-3-26 01:18:04
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大门在汇总
发表于 2025-3-26 08:16:29
The Roundworms (,),inted at both ends and it shows no sign of segmentation such as is characteristic of the true worms. On the outside is a clear elastic cuticle which is shed four times during the period of development from egg to adult. Near the anterior end is a mouth (which is lacking in some forms). This leads th
细胞膜
发表于 2025-3-26 11:11:21
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抱狗不敢前
发表于 2025-3-26 12:58:23
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Osteoporosis
发表于 2025-3-26 18:53:47
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