1) Which of the following correctly states the relationship between hippos and whales? (1 point)
A) Whales evolved from hippos.
B) Hippos evolved from whales.***
C) Hippos and whales do not share a common ancestor.
D) Hippos and whales evolved from a common ancestor.
2) fossil record contains many intermediate forms of at least one evolutionary line of animals. Beginning with a set of ancient fossils of extinct animals that had three toes, the fossil record continues with intermediate forms containing two toes, and then to a single toe. What concept does this finding support? (1 point)
A) reproductive isolation
B) gradualism***
C) speciation
D) punctuated equilibrium
3) Think about the factors that will influence the evolution of humans in the future. Name one factor that would exert influence through the process of natural selection and one factor that would exert influence through artificial selection. (1 point)
A) natural selection: genetic engineering; artificial selection: demands placed on the brain
B) natural selection: individual mating choice; artificial selection: diseases
C) natural selection: diseases; artificial selection: genetic engineering***
D) natural selection: demands placed on the brain; artificial selection: diseases
4) Under which of the following conditions will speciation not occur? (1 point)
A) Logging operations in a forest cut a single population of beetles in two so that they can no longer mix.***
B) Some snails in a population develop shells that twist to the right instead of to the left, which makes mating impossible with partners of opposite shell shape.
C) A newly constructed housing development divides the habitat of a bird species in two, forcing the birds to fly from one section to the other.
D) Some females of a species of spider prefer to mate with males that have red markings while other females prefer to mate with males with no markings.
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i need answers for the whole test
1) To determine the correct answer, we need to understand the relationship between hippos and whales. The correct answer is B) Hippos evolved from whales. To come to this conclusion, you can look at the evidence from the fossil record and genetic studies. Fossil evidence shows that whales evolved from ancient land-dwelling mammals that looked similar to hippos. Over time, these ancestral mammals gradually transitioned from living on land to living in water, eventually evolving into the whales we see today. Genetic studies also support this relationship, showing that hippos and whales share a common ancestor. So, the correct answer is B) Hippos evolved from whales.
2) The concept supported by the finding in the fossil record, where there are intermediate forms of animals with varying numbers of toes, is gradualism. Gradualism is the idea that evolutionary changes happen slowly and gradually through small, incremental changes over long periods of time. In this case, the presence of fossils showing a transition from three-toed animals to two-toed animals and then to one-toed animals supports the idea of gradualism, where the transition between different forms occurs gradually over time.
3) To answer this question, we need to understand the factors influencing human evolution. One factor that influences human evolution through the process of natural selection is diseases. Natural selection favors individuals with genetic variations that provide resistance or immunity to diseases, allowing those individuals to survive and reproduce more successfully. So, natural selection can shape the human population over time by favoring individuals with genetic traits that offer protection against diseases.
On the other hand, one factor that influences human evolution through artificial selection is genetic engineering. Artificial selection occurs when humans selectively breed organisms for specific traits. In the case of humans, genetic engineering can be used to modify the genetic makeup of individuals by manipulating their DNA. This can be done to enhance certain traits or remove undesirable traits, thus exerting influence on the evolution of humans through artificial means.
Therefore, the correct answer is C) natural selection: diseases; artificial selection: genetic engineering.
4) To determine the condition under which speciation will not occur, we need to understand the process of speciation. Speciation occurs when a population of organisms becomes reproductively isolated, leading to the development of distinct species. In the given options, the only condition under which speciation will not occur is A) Logging operations in a forest cut a single population of beetles in two so that they can no longer mix. Speciation requires reproductive isolation, which means that populations are unable to interbreed. When logging operations divide a population in such a way that they can no longer mix and reproduce with each other, reproductive isolation is achieved, potentially leading to speciation. Therefore, the correct answer is A) Logging operations in a forest cut a single population of beetles in two so that they can no longer mix.
1. the answer is D not B
2. the answer is B
3. the answer is C you are correct
4. the answer is A you are correct