The Delhi Express runs @ 144 kilometers per hours and it reaches destination 20 minute ahead of schedule. If it averages 100 km/hour, it reaches 24 minute behind schedule. What is the average speed it should maintain in order to reach the destination on schedule?

#Question id: 10699

#Unit 10. Ecological Principles

Two plant species co-occur in a prairie. Species X always occurs near species Y. However, species Y often occurs in isolation from species X and produces more seeds when alone than when growing next to species X. Which of the following interactions between species X and Y could generate this pattern?

#Question id: 10700

#Unit 10. Ecological Principles

Which of the following most important conclusion from the graph?

#Question id: 10701

#Unit 10. Ecological Principles

In community, two species A and B were found. A species have an especially large impact on the structure of entire communities because they are highly abundant while B species are not usually abundant in a community however; exert strong control on community structure by their pivotal ecological roles, or niches. Which of the following is naming of species?

#Question id: 10702

#Unit 10. Ecological Principles

Species A has a large effect on community because of its abundance in community known as

#Question id: 10703

#Unit 10. Ecological Principles

Keystone predators can maintain species diversity in a community if they

#Question id: 10704

#Unit 10. Ecological Principles

Imagine five forest communities, each with one hundred individuals distributed among four different tree species (W, X, Y, and Z). Which forest community would be most diverse?