Which of the following statements about extinction is not correct? (a) extinction is the permanent loss of a species (b) extinction is a natural biological process (c) once a species is extinct, it never reappears (d) human activities have little impact on extinctions (e) thousands of plant and animal species are currently threatened with extinction

Identify each of the following as an example of MICROEVOLUTION or MACROEVOLUTION.Then，state whether it supports the theory of gradualism or punctured equilibrium.（a） The Cambrian explosion（a period of rapid evolutionary change where many complex organisms evolved）.（b）The evolutionary change of animals and terrestrial plants.（c）beetles with a GREEN sheen are more prevalent than beetles with a BLACK sheen.

Is the following statement consistent with the provided data?  Answer TRUE if the statement is consistent with the data.Answer FALSE if the statement is not consistent with the data.  1. The evolution of freeze tolerance involves some factors that were not shaped directly by natural selection. 2. Because of their freeze tolerance, wood frogs may colonise more of the remainder of the island of Newfoundland than the leopard frog. 3. The distribution of the wood frog and leopard frog supports character displacement as a plausible hypothesis for why they overlap.

Which part of these statements isn't right ?       A species is a group of organisms that can potentially interbreed with one another to produce viable, fertile offspring. Speciation is when two new species form from one original one. Sympatric speciation occurs when there is a geographic separation of a population. Allopatric speciation occurs while the population remains in the same area. Adaptive radiation occurs when one species evolves into many to fill several different niches. Natural selection requires traits to be passed from parent to offspring, more offspring are produced than can survive creating competition, and inherited traits vary among offspring. Fossils, Anatomy and embryology, biogeography, and molecular biology all provide support for the theory of evolution. Evolution can be driven by many different things. Mutations are changes in DNA that create new alleles in a population. Gene flow is the flow of alleles in and out of a population resulting from the migration…

What three processes characterize many major transitions? Would you consider mammals such as cetaceans (whales & dolphins) moving from terrestrial to aquatic habitats as a major transition? Explain

The presence of homologous structures in two different groups of organisms suggests that (a) the organisms evolved from a common ancestor (b) convergent evolution has occurred (c) they belong to a polyphyletic group (d) homoplasy has occurred (e) independently acquired characters may evolve when organisms inhabit similar environments

Which of the following contributed to mass extinctions?a. climate changeb. continental driftc. meteor impactsd. All of these are correct.

Define extinction

The Galapagos archipelago consists of volcanic islands that formed within the last 5 million years. Darwin wrote of the finches on these islands, "...from an original paucity of birds in this archipelago, one species has been taken and modified for different ends." The Galapagos finches are an example of adaptive radiation driven by a. behavioural innovation. b. morphological innovation. c. ecological opportunity. d. physiological innovation.

The power-based relationship between number of species and area (i.e. S = cA^z) is very well documented. Which of the following processes might be contributing to this relationship? (Select all that apply.) Immigration Evolution Extinction None of the above