The Red Queen hypothesis is popular in ecology because it explains well the interaction between two chess pieces, which is a metaphor for sexual selection among related species evolutionary arms race between trees and fish, where trees take up nutrients released by dying salmon evolution of spider web shapes in forests compared to those in grasslands effect of parasites on host population sizes and therefore effects on competitor species evolutionary arms race between parasites and hosts

The theory of island biogeography suggests that island colonization is affected by which of the following factors? Allopatric speciation Ecological tolerance Adaptative evolution Migration rates A) II only  B) IV only C)  I and II D)  II and III

Could you please help find a reasonable answer that fit the hypothesis?

Approximately 14,000 years ago, the climate in North America began to warm rapidly. At the same time, human hunters migrated to the continent. Which of these most likely resulted from a combination of these two factors? an increase in the rate of large mammal extinctions a reduction in the rate of species change an increase in the amount of interspecies cooperation a reduction in the total number of small parasitic insects

Give typing answer with explanation and conclusion Consider this claim: Changes in environmental conditions always result in new ecosystems and loss of biodiversity characterized by an increase in the number of some species, the evolution of new species, and the extinction of some species. Use what you have learned from the lesson, as well as reliable and reputable resources, to evaluate this claim. Use at least three examples from the lesson and other sources to support the valid ideas in the claim and refute the invalid?

Using what was talked about in class, which of the following would most indicate an ecosystem that is the most resilient to change?   (a) Many species with a lot of connections (b) Few species with few connections (c) None of these (d) Many species with few connections

Adaptive radiations will most likely occur in areas where; The climate is the same year round The landscape is mostly homogenous and all of the habitats are similar to each other The landscape has very limited soil nutrients The landscape is highly variable and there are many different habitats

SCENARIO: Ecologists have recently made an observation regarding a species of nematode (round worm) commonly found in Australian soils with two distinct phenotypes appearing, the mutant form appears to have increased cuticle formation. This species is a crucial part of their ecosystem’s food web and is a predator of many soil microbes. The divergent phenotype appears to negatively affect its predatory behaviour, which could have disastrous flow on effects to the rest of the ecosystem. Preliminary studies also indicate this phenotype has a genetic basis, so is not caused by infection. You have been tasked with uncovering the genetic basis of this phenotype. Q6. Given the phenotype leads to a negative impact on the nematode’s predatory behaviour, develop a hypothesis as to why this phenotype is increasing among the population (i.e. it is being positively selected for): Q7. Briefly describe an experiment you could use to test this hypothesis: