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In the sentence "Natural selection is the mechanism of evolution," what does the term mechanism mean?
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A group of organisms that can mate with each other to produce fertile offspring is known as a (n)______
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Science Test 8,9,10
4-3-2013
| Question | Answer |
|---|---|
| In the sentence "Natural selection is the mechanism of evolution," what does the term mechanism mean? | A working machine like; in progress. |
| A group of organisms that can mate with each other to produce fertile offspring is known as a (n)______ | species(298) |
| A (n) _____ makes an organism better able to survive in its environment. | adaptation(298) |
| Charles Darwin observed variations between individuals within a population, but he did not know how variations occur. What causes variation in a population? | Genetic Variation(310) |
| The fossil record is a history of life indicated by fossils found in Earth's crust. What information about organisms in an environment can the fossil record provide? | How organisms in an environment changed over time.(298) |
| Darwin puzzled over the various species of Galapagos finches, the finches adapted to various environments on the islands. On what traits did Darwin base his conclusions. | Beak size and shape(306) |
| Darwin developed the theory of evolution by making careful observations and by studying ideas from different fields. What did not influence Darwin? | evidence from Molecular biology(306) |
| Identify two ways that organisms can be compared to provide evidence of evolution from a common ancestor. | They look alike, their genetic code is close.(311) |
| Why are some animals more likely to survive to adulthood than other animals are? | because they are stronger more adapted than others.(298) |
| Describe how environmental changes can cause species to become extinct. | The other species didn't adapt fast enough.(298) |
| Identify some of the adaptations that sea turtles have for living in the ocean. | There shell, fins, scales on their skin, small head, hold breath, heart rate |
| What are the four parts of natural selection | 1)a change in the animal occurs, 2)the change is either an advantage or a disadvantage, 3)the disadvantage kills the animal, 4)and the advantage helps the animal survive. |
| Geoligists have evidence that the continents we3re once a single giant landmass. This giant landmass eventually split apart, and the individual continents moved to their current positions. What role might this movement of continents played in evolution? | The animals could've died from environmental change of adapted. |
| Tarantulas defend themselves by flicking hairs into the eyes of their predators. SOme populations of tarantulas do not have these hairs.Why are the tarantulas that have these hairs more likely to produce offspring than the hairless tarantulas? | The hairless tarantula will die from the predators. |
| Similar species of lizards can be found on several Caribbean islands.The species have different traits that match the different environments they live. How would speciation produce these different species of lizards. | The lizards probably adapted. |
| During dry years fewer seeds are produced.Birds have to able to eat large tough seeds.How does the change of this environmental factor affect the average beak size of Galapagos finches? | The Galapagos finches have to make their beaks larger and stronger to eat the hard large seeds.(300) |
| Imagine that a storm blew some of the birds on the Galapagos islands to a new island. The new island receives a large amount of rain. After several generations on the new island, what would you expect to happen on the average beak size of the finches? | The beak would shrink and be able to dig. |
| Whales share a more recent common ancestor with land mammals than they do with fishes. Whales breath air, give birth to live young, and produce milk. Their DNA is more similar to land mammals than fish. How can whales and fishes have similar adaptations? | They had to adapt to swim in the water. |
| What is a word with a close meaning to the word diversity? | change |
| In the sentence " the theory of evolution was first proposed by Charles Darwin", What does the word theory mean? | an explanation developed using scientific method. |
| Species that evolve _______ characteristics are more likely to survive environmental changes than species that do not develop these characteristics. | adaptive |
| What word means any system or means by which something gets done? | mechanism |
| Which term best describes a species in which all of the members have died? | extinct |
| Charles Darwin noticed that finches on different islands of the Galapagos Islands were similar but that were similar but that their beaks differed. What explanation for these differences did he propose? | The beaks of the finches are adapted to the way the bird usually gets food. |
| What are the factors necessary for natural selection to occur in a species? | genetic variation within a population. |
| Scientists have noticed similarities between a bats wings and a dolphins flippers. What does this evidence tell us about the evolution of bats and dolphins? | bats and dolphins probably have a common ancestor. |
| What environmental changes would directly affect primary consumers? | The disappearance of of scavengers. |
| Which of the following is an abiotic factor most likely to affect the development of organisms living in the river. | The speed at which the river travels. |
| What is the primary structure that contains genetic information? | DNA |
| Organisms that reproduce sexually contribute _____ of their genes to their offspring. | About one-half |
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bmdennis1@msn.com