Which of the following represent homologous features?
  • I and II only.
  • I and II only
  • The appendix in humans and horses.
  • Same fossil forms in all layers.
Which of these conditions would prevent natural selection of particular characteristics in a population over time?
  • Variations amongst individuals of a population are selected by a changing environment.
  • Some bacteria showing resistance to antibiotics survive after antibiotics are used.
  • All variation between individuals is due only to environmental factors.
  • I and II only.
Natural selection is based on all of the following, except:
  • I and II only.
  • Island and mainland forms descended from common ancestors.
  • Variations amongst individuals of a population are selected by a changing environment.
  • Individuals adapt to their environments and, thereby, evolve.
What would the fossil record look like, if evolution had not occurred?
  • Same fossil forms in all layers.
  • The appendix in humans and horses.
  • Choose which organisms breed, and which do not.
  • Some bacteria showing resistance to antibiotics survive after antibiotics are used.
What is natural selection?
  • The mechanism that increases the chance of certain individuals reproducing.
  • The cumulative change in the genetically controlled characteristics of a species.
  • Some bacteria showing resistance to antibiotics survive after antibiotics are used.
  • They have the same ancestral origin but may have different functions.
If pollution is cleaned up, what should happen to the colour of moths living in the non-polluted areas?
  • Island and mainland forms descended from common ancestors.
  • Light coloured moths should become more common.
  • Choose which organisms breed, and which do not.
  • A change occurs in the environment.
What is the implication of development of antibiotic resistance in bacteria?
  • Some bacteria showing resistance to antibiotics survive after antibiotics are used.
  • Same fossil forms in all layers.
  • All variation between individuals is due only to environmental factors.
  • They have the same ancestral origin but may have different functions.
Which factors could affect whether a species evolves?I. Environmental changeII. InbreedingIII. Variation
  • I and II only.
  • I, II and III
  • All variation between individuals is due only to environmental factors.
  • I and II only
Organisms on islands are sometimes different from, but closely related to, comparable forms found on the nearest mainland. This can be seen as evidence that:
  • A change occurs in the environment.
  • Light coloured moths should become more common.
  • Island and mainland forms descended from common ancestors.
  • Individuals adapt to their environments and, thereby, evolve.
What happens to a population when natural selection is applied?
  • All variation between individuals is due only to environmental factors.
  • Variations amongst individuals of a population are selected by a changing environment.
  • Some bacteria showing resistance to antibiotics survive after antibiotics are used.
  • Individuals adapt to their environments and, thereby, evolve.
Which of the following may be used as evidence for evolutionI. Homologous structuresII. Selective breeding of domesticated animalsIII. Overproduction of offspring
  • The appendix in humans and horses.
  • I and II only.
  • I and II only
  • I, II and III
The increased occurrence of methicillin-resistant Staphylococcus aureus (MRSA) can be seen as an example of artificial selection because:
  • Island and mainland forms descended from common ancestors.
  • Humans produce methicillin and thus create environments in which bacteria frequently come into contact with methicillin.
  • When an antibiotic is used, only bacteria that are resistant to it survive and these bacteria pass on resistance to their offspring.
  • All variation between individuals is due only to environmental factors.
What best describes homologous structures?
  • All variation between individuals is due only to environmental factors.
  • Some bacteria showing resistance to antibiotics survive after antibiotics are used.
  • The cumulative change in the genetically controlled characteristics of a species.
  • They have the same ancestral origin but may have different functions.
Natural selection is based on which of the following?I. Genetic variation exists within a species.II. There is differential reproductive success within populations.III. Individuals will adapt to their environment.
  • Individuals adapt to their environments and, thereby, evolve.
  • I and II only.
  • I, II and III
  • I and II only
During a lesson about evolution, one of your fellow students remarks, 'The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result.' Which statement is most likely to be helpful in correcting this student's misconception?
  • Some bacteria showing resistance to antibiotics survive after antibiotics are used.
  • Too many offspring.
  • I and III are correct.
  • Characteristics acquired during an organism's life are generally not passed on through genes.
Which of the following will promote variation in a species?I. MeiosisII. FertilizationIII. Natural selection
  • I and II only
  • The appendix in humans and horses.
  • I and II only.
  • I, II and III
The role that humans play in artificial selection is to:
  • Choose which organisms breed, and which do not.
  • Light coloured moths should become more common.
  • Same fossil forms in all layers.
  • The appendix in humans and horses.
0:0:1



Answered

Not Answered

Not Visited
Correct : 0
Incorrect : 0