A: Species R and S
B: Species S and T
C: Species T and W
D: Species S and W
举一反三
- Darwin's most important book On the Origin of Species was the result of many years of research. </p></p>
- According to the professor, why is location so important to an animal group A: Certain species prefer to be high up in trees. B: Each species needs a limited amount of space. C: Food and safety are closely related to where a group lives. D: Some groups will forget to protect their homes.
- Which of the following options is most closely related to the golden ratio A: Perspective composition B: Length of coastline C: Fipolacci sequence D: Area of triangle
- Which of the following vegetables is most closely related to cabbage? （ ） A: Spinach B: Broccoli C: Lettuce D: Beet
- Which of the following is the correct sequence (from broad to specific) of the major taxonomic categories? A: domain, kingdom, phylum, class, order, family, genus, species B: domain, species, genus, family, order, class, phylum, kingdom C: phylum, class, kingdom, domain, order, species, family, genus D: kingdom, order, class, phylum, family, genus, species E: genus, species, domain, phylum, class, order, family, kingdom
内容
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Effects of long term use of pesticides include ( ) A: imbalances in ecosystems B: develop new dominant pest species C: lose keystone species. D: Beneficial organisms and even natural enemies of the pests may be among the species eliminated by pesticides
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One million of the earth’s eight million species are in danger.( )
- 2
In Taine’s view, race is closely related to _____.
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Invasive species are defined as A: a species not native to an area that spreads and causes damage to the area B: species suited to stable environments that produce a few, relatively large offspring and provide parental care C: species suited to changing environments that produce many offspring and provide little or no parental care D: species whose presence is key to maintaining biodiversity in an ecosystem and to upholding an ecological community’s structure
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The rainforests are one of the most _______ places on Earth. There are so many species!