The collection of all the populations of different species in an area forms a ___. A. ecosystem B. biotic community C. population D. food chain 相关知识点: 试题来源: 解析 B。本题考查相关概念。一个区域内不同物种的所有种群的集合形成生物群落。选项 A“ecosystem”还包括非生物成分。选项 C“...
have been reported from this species. In this study, morphological, phytochemical, antioxidant and genetic variations of 11 distant populations of P. verticillatum were measured. Considerably ( P <0.05) higher variations were recorded among different populations of P. verticillatum using morphological...
Organisms of different species frequently evolve adaptations that make them utterly and specifically dependent on each other for resources.For example, many trees must have mycorrhizal fungi living in their root systems, fungi that are indispensable to the tree because they facilitate mineral uptake from...
But, in a historical sense,numerically fixated people like us are the unusual ones. For the bulk of ourspecies’ approximately 200,000-year lifespan, we had no means of preciselyrepresenting quantities. What’s more, the 7,000 or so languages thatexist today vary dramatically in how they ut...
AsGilbertWhite,Darwin,andothersobservedlongago,allspeciesappeartohavetheinnatecapacitytoincreasetheirnumbersfromgenerationtogeneration.Thetaskforecologistsistountangletheenvironmentaandbiologicalfactorsthatholdthisintrinsiccapacityforpopulationgrowthincheckoverthelongrun.Thegreatvarietyofdynamicbehaviorsexhibitedbydifferent...
4. The Serengeti is definitely on my bucket list. Imagine seeing millions of wild animals of different kinds—lions, elephants, monkeys—in their natural environment. You can camp in the park at night and during the day, you can see the animals up close. I hope I can do this someday....
In ecology, a population consists of all the organisms of a given species that live in a particular area. The statistical study of populations and how they
training a language model on more than 6500 different documents as represented in 41 multilingual text collections consisting of ~ 3.5 billion words or ~ 9.0 billion characters and covering 2069 different languages that are spoken as a native language by more than 90% of the world ...
Male sterility has been recently discovered in Californian populations of rose clover (Trifolium hirtum). This study describes the frequency distribution of male sterility in Turkish and Californian populations, and compares fitness components of hermaphrodites and females. As male-steriles were found in...
根据本题题干中的“different populations”可将本题的答案信息来源确定在首段的第一句,因为该句中的“all species”实际上指的就是题干中的“different populations”。从第一段的首句入手并且仔细阅读首段的第二句,就可以找出本题的正确选项D,因为该选项所传达的信息与原文第一段第一、二句所传达的信息不一致...