最新提问
我的动态
登录后查看动态
题目内容双击单词支持查询和收藏哦～
题目材料：
Some members of the plant family Araceae produce as much heat in proportion to their weight as do birds and insects in flight, which are the greatest heat producers among animals. Researchers have argued that these plants evolved their heat-producing ability because the heat vaporizes scents that attract pollen-bearing insects, thereby enhancing the chances for reproduction. One member of the family Araceae. Philodendron selloum, also has the unusual ability to thermoregulate: it can vary its heat production to compensate for fluctuations in the temperature of the surrounding air, thereby maintaining a nearly constant temperature in its inflorescence, or flowering part. Since constant temperatures are not required to vaporize attractants, some scientists contend that P. selloum' s ability to thermoregulate evolved because it protects the inflorescence during critical stages of development. Seymour, however, notes that the periods during which P. selloum thermorequlates coincide with the periods during which the inflorescence's opening widens to admit pollen-bearing beetles. Seymour explains P. selloum's ability to maintain a constant temperature as a further attraction for pollinators, which require a high body temperature for flight and locomotion and often expend substantial energy to keep warm. Pollinators that visit thermoregulating plants would be provided with a fairly steady level of heat directly from the plant.
以上解析由 考满分老师提供。
