Homework Answers
Answer: a. Artificial selection
According to the artificial selection theory, the selection by breeders is held responsible for the speciation. For example, the formation of hybrid may lead to the new species under the defined set of environmental conditions.
The natural selection represents different survival and reproduction of the individuals of different phenotype. natural selection act upon the organism phenotype and the indirectly on genotype. Natural selection considered survival and reproduction.
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Which of the following statements does not play a direct role in natural selection? Read all...
Evolution by Natural Selection can be described as: A) individuals with traits that increase survival will...
Evolution by Natural Selection can be described as: A) individuals with traits that increase survival will become more common, even if they don't reproduce B) individuals with genes that allow them to sacrifice themselves for the species are the more evolved C) Species evolve as a whole with all individuals within the population evolving at the same time D) Individuals with traits that increase survival and produce more offspring as a result, their genes become more common in the population
1) Darwin's four postulates include (circle all that apply)
1) Darwin's four postulates include (circle all that apply) a) Reproductive success and survival are NOT predictable b) There is variation in a population c) Some trait differences in a population are heritable and are passed from generation to generation d) Individuals with certain traits are more likely to survive and reproduce e) All of the above are Darwin's postulates. 2) For each of the following, indicate whether the statement is True or False (circle correct choice) a) An adaptation is a behavior...
help 4.) Darwin's Theory of Natural Selection stated that: a.) At one time the earth held...
help
4.) Darwin's Theory of Natural Selection stated that: a.) At one time the earth held all the species and each catastrophic event would destroy certain species - survivors would repopulate the world b.) Environmental pressures and internal needs bring about changes in body form and function and this is passed on to their offspring c.) Process in which individuals with favorable inherited traits are more likely to survive and reproduce at a higher rate than other individuals 5.) Convergent...
1. Which of the following is/are required for natural selection to occur? A. The trait must...
1. Which of the following is/are required for natural selection to occur? A. The trait must be used or it will no longer be passed down B. Trait must be inherited from the father, not mother C. The species could produce more offspring than their environment can support D. Members of the population must have inherited traits that could vary E. Members must have an equal ability to survive and reproduce 2. Which of the following statements is/are true? A....
What role does control of gene expression play in the diversity of individuals of the same...
What role does control of gene expression play in the diversity of individuals of the same species within a population, and how does this individual diversity contribute to natural selection? Point mutations within the DNA are often considered neutral, in that they have no discernable effect on the phenotype of the affected individual. Why is this the case? What properties of the genetic code contribute to the neutrality of point mutations? Why are mutations that add or subtract nucleotides within...
Please help and explain Biological fitness is best defined as A) a heritable trait that increases...
Please help and explain
Biological fitness is best defined as A) a heritable trait that increases the match of an individual to its environment. B) similar reproductive success among individuals in a population. C) variability in the population for a trait that increases survival. D) the ability of an individual to produce offspring that survive and reproduce, relative to other individuals in the population. E) competition among individuals for resources that allow them to have more offspring Phylogenetic trees constructed...
D 21. Which of the following is an example of sexual selection? In clownfish, the largest...
D 21. Which of the following is an example of sexual selection? In clownfish, the largest individual in a group becomes female because females can lay more eggs if they are large whereas it takes fewer resources to make sperm In aphids, most individuals reproduce asexually during the summer, but switch to sexual reproduction during the fall In chimps, the babies learn how to crack nuts by watching their mothers perform this task In bowerbirds, males that produce the most...
16. Which mode of natural selection is demonstrated by the Ginkgo tree today remaining essentially similar...
16. Which mode of natural selection is demonstrated by the Ginkgo tree today remaining essentially similar morphology since the Mesozoic era? a. stabilizing b. directional c. diversifying d. sexual e. artificial 17. Which scenario will demonstrate disruptive (diversifying) selection? a. There is heterozygote advantage (heterozygous individuals have the highest fitness). b. Female flies collect sperm from different males in her sperm bag. c. Individuals with intermediate phenotype are inferior competitors against homozygous individuals d. Insects become resistant to the most...
NTRODUCTION Under nearly all circumstances, postzygotic reproductive isolation cannot evolve under the direct action of natural...
NTRODUCTION
Under nearly all circumstances, postzygotic reproductive
isolation cannot evolve under the direct action of natural
selection. Instead, postzygotic isolation evolves as a by-product
of other genetic changes as proto-species diverge. In contrast,
natural selection can directly act to enhance prezygotic
reproductive isolation. Consider two species with overlapping
ranges. If hybrids between the species are less fit than pure
species individuals, females that mated with heterospecific males
would be at a selective disadvantage, because their resulting
offspring had low fitness....
6. Which of these conditions will lead to evolution by natural selection? a. Heavy metal pollution...
6. Which of these conditions will lead to evolution by natural selection? a. Heavy metal pollution reduces reproductive success of all phenotypes of green algae in the pond. b. Variation among individuals is not genetic; instead it results from learned behavior or physiological environmental responses. c. Introduction of an exotic predator species results in one native prey phenotype evading predation while other phenotypes get eaten. d. Individuals of the population are clones (genetically identical). 7. Which one is used as...
help
4.) Darwin's Theory of Natural Selection stated that: a.) At one time the earth held all the species and each catastrophic event would destroy certain species - survivors would repopulate the world b.) Environmental pressures and internal needs bring about changes in body form and function and this is passed on to their offspring c.) Process in which individuals with favorable inherited traits are more likely to survive and reproduce at a higher rate than other individuals 5.) Convergent...
Please help and explain
Biological fitness is best defined as A) a heritable trait that increases the match of an individual to its environment. B) similar reproductive success among individuals in a population. C) variability in the population for a trait that increases survival. D) the ability of an individual to produce offspring that survive and reproduce, relative to other individuals in the population. E) competition among individuals for resources that allow them to have more offspring Phylogenetic trees constructed...
D 21. Which of the following is an example of sexual selection? In clownfish, the largest individual in a group becomes female because females can lay more eggs if they are large whereas it takes fewer resources to make sperm In aphids, most individuals reproduce asexually during the summer, but switch to sexual reproduction during the fall In chimps, the babies learn how to crack nuts by watching their mothers perform this task In bowerbirds, males that produce the most...
16. Which mode of natural selection is demonstrated by the Ginkgo tree today remaining essentially similar morphology since the Mesozoic era? a. stabilizing b. directional c. diversifying d. sexual e. artificial 17. Which scenario will demonstrate disruptive (diversifying) selection? a. There is heterozygote advantage (heterozygous individuals have the highest fitness). b. Female flies collect sperm from different males in her sperm bag. c. Individuals with intermediate phenotype are inferior competitors against homozygous individuals d. Insects become resistant to the most...
NTRODUCTION
Under nearly all circumstances, postzygotic reproductive
isolation cannot evolve under the direct action of natural
selection. Instead, postzygotic isolation evolves as a by-product
of other genetic changes as proto-species diverge. In contrast,
natural selection can directly act to enhance prezygotic
reproductive isolation. Consider two species with overlapping
ranges. If hybrids between the species are less fit than pure
species individuals, females that mated with heterospecific males
would be at a selective disadvantage, because their resulting
offspring had low fitness....
6. Which of these conditions will lead to evolution by natural selection? a. Heavy metal pollution reduces reproductive success of all phenotypes of green algae in the pond. b. Variation among individuals is not genetic; instead it results from learned behavior or physiological environmental responses. c. Introduction of an exotic predator species results in one native prey phenotype evading predation while other phenotypes get eaten. d. Individuals of the population are clones (genetically identical). 7. Which one is used as...
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