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ch 11 study guide
Terms in this set (26)
which term refers to similar structures that related species have inherited from a common ancestor
how have humans activities endangered the flordia panther
humans have reduced their available habitat areas
the number of different species in an area is referred to as its
how does natural selection lead to evolution
helpful variations accumulate among surviving members of the species
Darwin concluded that organisms on the Galapagos islands
had changed over time
the gradual change in species over time is called
which of these is one of the main ways that a new species forms
a group is separated from the rest of the species
how does fossil evidence from the ancestors of whales support evolution
their ancestors had legs, which suggests a common ancestor with land vertebrates
what did darwin observe about finches in the Galapagos island
their beaks were adaptations related to the foods the finches ate
a trait that helps an organism survive and reproduce is called an
coral reefs are biologically diverse ecosystems because they support many different_________ which allow a great number of species to live there
the only traits that can be acted upon by natural selection are those that a controlled by____________
natural selection is affected by_________, or traits that are different in members of the same species
a__________, is a well-tested concept that explains a wide range of observations
similarities in the early development of chickens and pigs suggest that these animals share a common__________
True or False:
Scientists theorize that ecosystems found in the tropics show greater biodiversity because of favorable climate conditions.
True or False:
Genetic similarity allows some varieties of monkey flower to survive and reproduce in soil contaminated by cooper
False ( Genetic Variations)
When some members of a species become isolated, they are less likely to form a new species.
False (more likely)
The more similar the DNA sequences of two species are, the more closely related the species are.
Sea turtles laying more eggs than can possibly survive is an example of COMPETITION as a factor in natural selection
False (OVER PRODUCTION)
What body parts help the animals (whale, walrus, shark) survive in their environment through natural selection. How?
Each animal has flippers or fins to help them swim. Their body parts let them get their food in order to live
How do the similarities in body structure shown in the diagram support the theory of evolution?
They all have a round body shape. This clue is that the animals might have shared a common ancestor and evolved from them.
Three animals (shark, walrus, whale) share adaptations to which aspect of their environment.
All of the animals share adaptations to the ocean where they seek for food and spend their time in the water.
Suppose Finch B uses the twig in its mouth as a tool. How is this different from the other adaptations the finches display? How do you think this adaptation helps it's species survive?
The Finch can use the twig to reach around in the trees. It can help it find food in the trees. Finch B uses a twig while the others use their beaks.
Each species of finch eats a different kind of food: seeds, insects, cactus or fruit (plants). Match each since with the food you think it eats. Explain your answer.
Finch A: ground, crushing
Finch B: trees, probing
Finch C: ground, grasping
Finch D: ground or among cactus plants, probing
Finch E: in trees, tearing
I think Finch A eats seeds, B eats insects, C eats plans and insects, D eats cactus and Finch E eats fruit. Each finch's beak helps them eat the food that they need and that is provided in their environment.
Compare the habitats of the two finches that have probing beaks. Finch B: trees, probing and Finch D ground or among cactus plans, probing.
Do you think both species occupy the same niche? Explain your answer.
They do not occupy the same niche, because while they both use their beaks for probing, one finch lives in the trees while the other one is on the ground.
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