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TLS Online TPP Program

#Question id: 12340

Keystone species are thought to have profound effects on the structure and composition of ecological communities because they

#Section 1: Ecology
  1. Tend to reduce diversity by eliminating food resources for other species
  2. Provide the foundation for food webs
  3. Are more abundant than most other species in their communities
  4. Can prevent superior competitors from driving inferior competitors to local extinction
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TLS Online TPP Program

#Question id: 12153

#Section 2: Evolution

Which of the following is not a resource? 
TLS Online TPP Program

#Question id: 16893

#Section 3: Mathematics and Quantitative Ecology

A random sample of 25 college males was obtained and each was asked to report their actual height and what they wished as their ideal height. A 95% confidence interval for μd = average difference between their ideal and actual heights was 0.8" to 2.2". Based on this interval, which one of the null hypotheses below (versus a two-sided alternative) can be rejected?
TLS Online TPP Program

#Question id: 4634

#Section 2: Evolution

Which of the following represents an idea that Darwin learned from the writings of Thomas Malthus?
TLS Online TPP Program

#Question id: 4730

#Section 2: Evolution

Cross is made between a pure breeding plant having red coloured male flowers with a pure breeding plant having white colored female flowers. All of these offspring are white colored flower. Upon selfing of these F1 red flower plant produced both red and white flower. Which of the following is conclusion of these cross?
TLS Online TPP Program

#Question id: 3300

#Section 2: Evolution

In a population individuals having heterozygous phenotype are more favored than either homozygous, under such condition-