纺织品
发表于 2025-3-30 08:36:21
The Polyzoa or Moss Animalcules,ciliated, and the cilia make currents which collect the small organisms used as food, and transport them to the mouth. Polyzoa possess a proper gut, which terminates in an anus; ovaries and testes (they are hermaphrodites); and a rudimentary nervous system. The fresh-water polyzoa reproduce asexuall
entice
发表于 2025-3-30 15:46:58
The Protozoa,g animals, feed by taking in complex food substances (i.e. by eating other animals, plants, or their decaying remains) which were ultimately produced by growing plants. The Protophyta feed for the most part like typical green plants — they contain chlorophyll which enables them to synthesize carbohy
Delirium
发表于 2025-3-30 20:03:41
http://reply.papertrans.cn/16/1577/157605/157605_53.png
flimsy
发表于 2025-3-30 23:52:39
http://reply.papertrans.cn/16/1577/157605/157605_54.png
容易懂得
发表于 2025-3-31 01:40:19
Heinrich Walter,Siegmar-W. Brecklef ponds and streams are very common, and are likely to be among the first living things to be observed by anyone beginning to study natural history. Many of them are large enough when adult to be studied without the aid of a microscope, though a hand lens will be useful even for them, in making out the details of their structure.
柏树
发表于 2025-3-31 08:12:47
http://reply.papertrans.cn/16/1577/157605/157605_56.png
Custodian
发表于 2025-3-31 11:04:24
http://reply.papertrans.cn/16/1577/157605/157605_57.png