Check the attached biology questions Test 4 General Biology Fall 2015 10. Close

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Check the attached biology questions

Test 4 General Biology Fall 2015 10. Close ecological interactions between two different species may lead to 1. Which of the following groupings of animals are most closely b. sympatric speciation b. bats, kangaroos, elephants d. lemurs, chimps, humans 2. The development of an upright posture in hominins is likely an 11. Some whales have teeth as embryos but do not as adults. What is the most likely explanation of this phenomenon? a. Whales are in the process of evolving teeth. b. Whale teeth appear as the result of a frequently occurring c. Whales evolved from organisms that have teeth d. The allele for teeth is unusually common in some whale a. living on the ground instead of in the trees b. living on land instead of in the water to carry tools d. having no functional knees a. predesigned change in the genetic characteristics of a population of organisms over time b. sudden shifts in the genetic characteristics of an individual in a 3. How is mitochondrial DNA inherited? a. All mitochondrial DNA is inherited from the mother b. Fifty percent of mitochondrial DNA is inherited from the mother and 50% from the father c. All mitochondrial DNA is inherited from the father d, Only 75% of mitochondrial DNA is inherited from the father the other 25% is inherited from the mother organisms over time d isolation of populations due to geologic forces 13. Which Georgia Southern alumnus discovered a new species of Homo in September 2015? 4. Which of the following statements is NOT true? a. Different species of hominins never coexisted on Earth b. Hominin evolutionary trees can be made clearer by analyzing available DNA c. There is evidence that various populations of hominins b. Hala Moddelmog b. is the principle cause of evolutionary change d. Fossil evidence indicates that as many as five different species of hominins existed one to two million years ago d. cannot occur without genetic drift 5. The fossils of two adult birds are found in a nest containing several fossilized eggs. Physically, the bird fossils look very different. What are scientists most likely to use to classify these fossil species? a. the biological species concept b. the morphological species concept c. the DNA based species concept 15. One of the reasons scientists have had so much difficulty finding a cure for HIV/AIDS is that the HIV virus is quick to evolve resistance to the drugs used to treat it. What is the most likely mechanism for this type of evolution? a. Certain versions of the virus persist longer in the presence of a drug than others. Those viruses may survive drug treatmert and pass their genes to their offspring. b. Every time an HIV drug is taken, it randomly kills off most but not all virus particles. Those that survive repopulate the 6. In light off the "out-of-Africa" hypothesis, which of the following is a reasonable explanation for why species like Homo body of their host. c. Although all copies of a particular strain of the HIV virus are neanderthalensis, Homo floresinensis, and Homo erectus do not that drugs cannot reach, and those viruses "teach" their Homo sapiens out-competed and replaced other hominin species as they migrated around the world b. Extensive gene flow between human populations led to a blending of traits that resulted in the evolution of Homo sapiens c. As modern Homo sapiens developed new and more accurate hunting skills they were able to hunt other hominin species to d. Some versions of the HIV virus produce chemicals that break down the drugs before they can harm the virus. 16. Which of the following is NOT a cause of evolution? b. gene flow 17. The fossil record same time d. d. Climate change in Africa caused the extinction of all hominin populations except for the ones that gave rise to modern Homo a proves that all known species of organisms appeared at the ciation g evidence that major new arose from previously existing organisms c. indicates that humans date back as far as the first indications of life d. has often been artificially created by evolutionary biologists a can result from geographic isolation b. occurs in the absence of genetic divergence c. occurs only in species living on remote islands d. reduces variation 18. Both humans and whales evolved from a common ancestor. Although our forelimbs are quite different, they are made of the same bones. This is an example of a(n) a. artificial selection b. homologous structure 8. Two birds that are very similar in morphology and live in the same forest exhibit different reproductive behaviors. Which of the following describes the relationships of these birds? a. These birds are the same species because they share b. Mating would be prevented because these birds would not respond to each other's behaviors c. Allopatric speciation is occurring between these birds d. Coevolution is causing these birds to have similar morphology 19. Whale DNA is more similar to hippo SNA than to the DNA of any other mammal. This indicates that a. whales descended from hippos b. hippos descended from whales c. hippos are whales' closest living relatives d. whales and hippos may be the same species 9. A rainforest is a highly complex habitat with organisms living at various levels in the trees, on the ground, and underground. Is it possible to consider two populations of insects living in the same tree to be geographically isolated? a. No, because if they are in the same tree, they are in the same 20. A population of 8250 mice occupies the sand dunes ina coastal area. A severe hurricane washes out several miles of sand dunes. As a result, only 50 mice remain. The population has eo b. No, because if they are in the same square acre, they cannot be c. founder effect geographically isolated. a. horizontal gene l gene transfer c. Yes, because insects only undergo allopatric speciation, and are many species of insects 21. An example of evolution that has been observed recently is d. Yes, because there are so many habitats in one tree that the populations may never interact.

Explanation / Answer

d. lemurs, chimps, human

Lemurs, chimps, humans monkeys and apes are most closely related to each other, they are all evolved from an early primate (means, their ancestor is same).

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