Fossils and genes are used to determine(1 point)
how many mutations occurred in a species over time.
how species will change over time.
differences between organisms.
how species interact with each other.
2. A common ancestor is an organism that is the(1 point)
direct ancestor of two or more different organisms.
indirect ancestor of two or more different organisms.
indirect ancestor of one organism.
direct 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)
The fossils came from the same organism.
The fossils are from an organism that is a descendant of organism X.
The fossils are from an organism that is an ancestor of organism X.
The fossils are from organisms that lived in the same location.
4. Which group includes only bipedal animals?(1 point)
primates
lesser apes
hominins
hominids
5. What does the fossil record tell us about the evolution of the hominin skull?(1 point)
The part of the skull surrounding the brain grew larger as hominins evolved.
The face stuck out farther from the rest of the skull as hominins evolved.
The part of the skull surrounding the brain grew more pointed as hominins evolved.
The face grew wider as hominins evolved.
6. Compared to rodents, rabbits have an extra pair of incisors and other skeletal structures that are different. What can scientists conclude from this observation?(1 point)
Rabbit teeth are better than rodent teeth.
Rodents and rabbits evolved from different mammal ancestors and lack a common ancestor.
All rodents have a more recent common ancestor than any rodent and rabbits.
Rabbits evolved from a species of rodent.
7. Humans, mice, and giraffes have seven vertebrae in their necks. What can scientists conclude from this observation?
(1 point)
All vertebrates have seven vertebrae in their necks.
Each animal independently evolved this trait.
These animals descended from a common ancestor.
Humans, 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)
wings
feathers
teeth
claws
9. Which pattern emerged in horse evolution as scientists studied early horse fossils and modern horse bones?(1 point)
Early and intermediate horses had four foot bones (three small and one large), and modern horses have three foot bones (two small and one large).
The 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.
Early and intermediate horses had three foot bones (two small and one large), and modern horses have four foot bones (three small and one large).
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. 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)
gill slits that turn into gills
scales as a form of skin
hatch from and lay eggs
spines and tails
11. Fish, amphibians, reptiles, birds, and mammals have similar embryos.
They all start with gill slits. Fish and some amphibians grow to have gills. Some amphibians, reptiles, birds, and mammals develop lungs to breathe air.
They all start with tails. Fish, some amphibians, reptiles, and birds grow tails. Humans do not keep their tails.
Fish and reptiles develop scales. Amphibians, birds, and humans have skin. Birds have feathers, and humans have hair.
Which two animals exhibit the most linear relationship?(1 point)
birds and humans
amphibians and fish
amphibians and reptiles
birds and reptiles
12. Which evidence supports the theory that fish and mammals evolved from the same ancestor? (1 point)
They both produce egg and sperm cells that must join in fertilization.
Their embryos share features in the late stages of development.
Their embryos share features in the early stages of development.
They both emerge from fertilized eggs.
13. Which pattern is evidence that reptiles and amphibians share the same ancestor? (1 point)
They have backbones.
They have eyes.
They have legs.
They have similar skin.
If you're really sure then here:
1.) differences between organisms
2.) Organisms with traits that help them survive and reproduce in their environment pass on those traits.
3.) whale hind limb
4.) fish and birds
5.) Humans and chimpanzees evolved from a common ancestor.
6.) These animals descended from a common ancestor.
7.) organisms that once lived.
8.) patterns in limb structures
9.) that these animals evolved from a common ancestor
10.) Which animal is older?
11.) Over time, the horse limb got longer.
12.) Their embryos share features in the early stages of development. (this is the right answer.)
13.) they all have internal skeletons. (I really don't know if this is the right answer.)
14.) primates, hominids, hominins
15.) direct ancestor of two or more different organisms.
16.) hominins
17.) The animal lived millions of years ago.
18.) All finch species evolved from a common ancestor.
19.) Pythons descended from an animal with legs.
20.) They have backbones.
Alr! I really hope this helps you and others! I found the correct answer for #12.) but not for #13.) so I took a second guess.
Don't mind me imma just grab my stuff and leave
what about the 20-question test I have what are the answers are the test is called evolutions test?!?!
My #6 is different, as the answers are not the same, here it is
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)
Rodents and rabbits evolved from different mammal ancestors and lack a common ancestor.
Rabbits evolved from a species of rodent.
Rabbit teeth are better than rodent teeth.
Rodents and rabbits share a common ancestor.