2. indirect ancestor of two or more different organisms.
3. The fossils are from an organism that is an ancestor of organism X.
4. hominids.
5. The face stuck out farther from the rest of the skull as hominins evolved.
6. Rodents and rabbits share a common ancestor.
2. A common ancestor is an organism that is the(1 point)%0D%0AResponses%0D%0A%0D%0Aindirect ancestor of two or more different organisms.%0D%0Aindirect ancestor of two or more different organisms.%0D%0A%0D%0Adirect ancestor of two or more different organisms.%0D%0Adirect ancestor of two or more different organisms.%0D%0A%0D%0Adirect ancestor of one organism.%0D%0Adirect ancestor of one organism.%0D%0A%0D%0Aindirect ancestor of one organism.
3. A scientist discovers a fossil of a new organism and places it in the fossil record. The fossil shows the organism had similar structures to organism X, which appears later in the fossil record. Which conclusion about the organisms is most reasonable?(1 point)%0D%0AResponses%0D%0A%0D%0AThe fossils are from an organism that is an ancestor of organism X.%0D%0AThe fossils are from an organism that is an ancestor of organism X.%0D%0A%0D%0AThe fossils came from the same organism.%0D%0AThe fossils came from the same organism.%0D%0A%0D%0AThe fossils are from organisms that lived in the same location.%0D%0AThe fossils are from organisms that lived in the same location.%0D%0A%0D%0AThe fossils are from an organism that is a descendant of organism X.
4. Which group includes only bipedal animals?(1 point)%0D%0AResponses%0D%0A%0D%0Ahominids%0D%0Ahominids%0D%0A%0D%0Ahominins%0D%0Ahominins%0D%0A%0D%0Alesser apes%0D%0Alesser apes%0D%0A%0D%0Aprimates
5. What does the fossil record tell us about the evolution of the hominin skull?(1 point)%0D%0AResponses%0D%0A%0D%0AThe face stuck out farther from the rest of the skull as hominins evolved.%0D%0AThe face stuck out farther from the rest of the skull as hominins evolved.%0D%0A%0D%0AThe face grew wider as hominins evolved.%0D%0AThe face grew wider as hominins evolved.%0D%0A%0D%0AThe part of the skull surrounding the brain grew more pointed as hominins evolved.%0D%0AThe part of the skull surrounding the brain grew more pointed as hominins evolved.%0D%0A%0D%0AThe part of the skull surrounding the brain grew larger as hominins evolved.
6. Compared to rodents, rabbits have an extra pair of incisors and other skeletal structures that are different. They also have some features that are similar. What can scientists conclude from this observation?(1 point)%0D%0AResponses%0D%0A%0D%0ARabbit teeth are better than rodent teeth.%0D%0ARabbit teeth are better than rodent teeth.%0D%0A%0D%0ARodents and rabbits share a common ancestor.%0D%0ARodents and rabbits share a common ancestor.%0D%0A%0D%0ARabbits evolved from a species of rodent.%0D%0ARabbits evolved from a species of rodent.%0D%0A%0D%0ARodents and rabbits evolved from different mammal ancestors and lack a common ancestor.
choose one option for each question
5 answers
7. Humans, mice, and giraffes have seven vertebrae in their necks. What can scientists conclude from this observation?%0D%0A%0D%0A(1 point)%0D%0AResponses%0D%0A%0D%0AAll vertebrates have seven vertebrae in their necks.%0D%0AAll vertebrates have seven vertebrae in their necks.%0D%0A%0D%0AThese animals descended from a common ancestor. %0D%0AThese animals descended from a common ancestor. %0D%0A%0D%0AEach animal independently evolved this trait. %0D%0AEach animal independently evolved this trait. %0D%0A%0D%0AHumans, mice, and giraffes have the same number of bones.
8. Archaeopteryx is considered to be a transitional form between dinosaurs and birds. Which of the following is a trait that is unique to both Archaeopteryx and modern birds? (1 point)%0D%0AResponses%0D%0A%0D%0Aclaws%0D%0Aclaws%0D%0A%0D%0Awings%0D%0Awings%0D%0A%0D%0Ateeth%0D%0Ateeth%0D%0A%0D%0Afeathers
9. Which pattern emerged in horse evolution as scientists studied early horse fossils and modern horse bones?(1 point)%0D%0AResponses%0D%0A%0D%0AEarly and intermediate horses had three foot bones (two small and one large), and modern horses have four foot bones (three small and one large).%0D%0AEarly and intermediate horses had three foot bones (two small and one large), and modern horses have four foot bones (three small and one large).%0D%0A%0D%0AEarly and intermediate horses had four foot bones (three small and one large), and modern horses have three foot bones (two small and one large).%0D%0AEarly and intermediate horses had four foot bones (three small and one large), and modern horses have three foot bones (two small and one large).%0D%0A%0D%0AThe earliest horses had a single large foot bone, intermediate forms had three foot bones (two small and one large), and modern horses have four foot bones (three small and one large).%0D%0AThe earliest horses had a single large foot bone, intermediate forms had three foot bones (two small and one large), and modern horses have four foot bones (three small and one large).%0D%0A%0D%0AThe earliest horses had four foot bones (three small and one large), intermediate forms had three foot bones (two small and one large), and modern horses have a single large foot bone.
10. Listed below are characteristics that serve as evidence of shared ancestry between fish and reptiles. Select the option that applies only to embryos rather than adults.(1 point)%0D%0AResponses%0D%0A%0D%0Agill slits that turn into gills%0D%0Agill slits that turn into gills%0D%0A%0D%0Aspines and tails%0D%0Aspines and tails%0D%0A%0D%0Ascales as a form of skin%0D%0Ascales as a form of skin%0D%0A%0D%0Ahatch from and lay eggs
11. Fish, amphibians, reptiles, birds, and mammals have similar embryos.%0D%0AThey all start with gill slits. Fish and some amphibians grow to have gills. Some amphibians, reptiles, birds, and mammals develop lungs to breathe air.%0D%0AThey all start with tails. Fish, some amphibians, reptiles, and birds grow tails. Humans do not keep their tails.%0D%0AFish and reptiles develop scales. Amphibians, birds, and humans have skin. Birds have feathers, and humans have hair.%0D%0A%0D%0AWhich two animals exhibit the most linear relationship?(1 point)%0D%0AResponses%0D%0A%0D%0Abirds and humans%0D%0Abirds and humans%0D%0A%0D%0Aamphibians and reptiles%0D%0Aamphibians and reptiles%0D%0A%0D%0Aamphibians and fish%0D%0Aamphibians and fish%0D%0A%0D%0Abirds and reptiles
choose one option for each question
8. Archaeopteryx is considered to be a transitional form between dinosaurs and birds. Which of the following is a trait that is unique to both Archaeopteryx and modern birds? (1 point)%0D%0AResponses%0D%0A%0D%0Aclaws%0D%0Aclaws%0D%0A%0D%0Awings%0D%0Awings%0D%0A%0D%0Ateeth%0D%0Ateeth%0D%0A%0D%0Afeathers
9. Which pattern emerged in horse evolution as scientists studied early horse fossils and modern horse bones?(1 point)%0D%0AResponses%0D%0A%0D%0AEarly and intermediate horses had three foot bones (two small and one large), and modern horses have four foot bones (three small and one large).%0D%0AEarly and intermediate horses had three foot bones (two small and one large), and modern horses have four foot bones (three small and one large).%0D%0A%0D%0AEarly and intermediate horses had four foot bones (three small and one large), and modern horses have three foot bones (two small and one large).%0D%0AEarly and intermediate horses had four foot bones (three small and one large), and modern horses have three foot bones (two small and one large).%0D%0A%0D%0AThe earliest horses had a single large foot bone, intermediate forms had three foot bones (two small and one large), and modern horses have four foot bones (three small and one large).%0D%0AThe earliest horses had a single large foot bone, intermediate forms had three foot bones (two small and one large), and modern horses have four foot bones (three small and one large).%0D%0A%0D%0AThe earliest horses had four foot bones (three small and one large), intermediate forms had three foot bones (two small and one large), and modern horses have a single large foot bone.
10. Listed below are characteristics that serve as evidence of shared ancestry between fish and reptiles. Select the option that applies only to embryos rather than adults.(1 point)%0D%0AResponses%0D%0A%0D%0Agill slits that turn into gills%0D%0Agill slits that turn into gills%0D%0A%0D%0Aspines and tails%0D%0Aspines and tails%0D%0A%0D%0Ascales as a form of skin%0D%0Ascales as a form of skin%0D%0A%0D%0Ahatch from and lay eggs
11. Fish, amphibians, reptiles, birds, and mammals have similar embryos.%0D%0AThey all start with gill slits. Fish and some amphibians grow to have gills. Some amphibians, reptiles, birds, and mammals develop lungs to breathe air.%0D%0AThey all start with tails. Fish, some amphibians, reptiles, and birds grow tails. Humans do not keep their tails.%0D%0AFish and reptiles develop scales. Amphibians, birds, and humans have skin. Birds have feathers, and humans have hair.%0D%0A%0D%0AWhich two animals exhibit the most linear relationship?(1 point)%0D%0AResponses%0D%0A%0D%0Abirds and humans%0D%0Abirds and humans%0D%0A%0D%0Aamphibians and reptiles%0D%0Aamphibians and reptiles%0D%0A%0D%0Aamphibians and fish%0D%0Aamphibians and fish%0D%0A%0D%0Abirds and reptiles
choose one option for each question
7. These animals descended from a common ancestor.
8. feathers
9. The earliest horses had a single large foot bone, intermediate forms had three foot bones (two small and one large), and modern horses have four foot bones (three small and one large).
10. gill slits that turn into gills
11. amphibians and reptiles
8. feathers
9. The earliest horses had a single large foot bone, intermediate forms had three foot bones (two small and one large), and modern horses have four foot bones (three small and one large).
10. gill slits that turn into gills
11. amphibians and reptiles
12. Which evidence supports the theory that fish and mammals evolved from the same ancestor? (1 point)%0D%0AResponses%0D%0A%0D%0ATheir embryos share features in the late stages of development.%0D%0ATheir embryos share features in the late stages of development.%0D%0A%0D%0ATheir embryos share features in the early stages of development.%0D%0ATheir embryos share features in the early stages of development.%0D%0A%0D%0AThey both produce egg and sperm cells that must join in fertilization.%0D%0AThey both produce egg and sperm cells that must join in fertilization.%0D%0A%0D%0AThey both emerge from fertilized eggs.
13. Which pattern is evidence that reptiles and amphibians share the same ancestor? (1 point)%0D%0AResponses%0D%0A%0D%0AThey have eyes. %0D%0AThey have eyes. %0D%0A%0D%0AThey have backbones. %0D%0AThey have backbones. %0D%0A%0D%0AThey have legs. %0D%0AThey have legs. %0D%0A%0D%0AThey have similar skin.
choose one option for those two questions
13. Which pattern is evidence that reptiles and amphibians share the same ancestor? (1 point)%0D%0AResponses%0D%0A%0D%0AThey have eyes. %0D%0AThey have eyes. %0D%0A%0D%0AThey have backbones. %0D%0AThey have backbones. %0D%0A%0D%0AThey have legs. %0D%0AThey have legs. %0D%0A%0D%0AThey have similar skin.
choose one option for those two questions
12. Their embryos share features in the early stages of development.
13. They have backbones.
13. They have backbones.
1 answer