Biology

The DNA of cats and dogs is much more similar than the DNA of cats and hamsters. Why is that?
Answer
| | The ancestors of cats and the ancestors of dogs evolved in similar environments. |
|| Cats and dogs are both carnivores and thus take in similar nutrients. |
| | Cats and dogs have a common ancestor that is more recent than the common ancestor of cats and hamsters. |
| |Cats and dogs have lived together with humans for a longer period of time, so they have grown more similar. |
| | Cats and dogs have fewer offspring during their lifetime than hamsters, so their DNAchange less rapidly |

According to the theory of common descent, each species on Earth today should
Answer
| | not have ancestors in common with members of other species. |
| | have DNAthat is mostly unique from other species. |
| | have evolved separately from different ancestors. |
| | have a single ancestor in common. |
| | look very similar to all other species. |When a biologist is looking for a suitable organism in which she can study the process of evolution in a laboratory setting, what would be an important consideration?
Answer
| | It should be ananimal rather than a plant. |
| | The organism should be large. |
| | The organism should have a short generation time. |
| | The organism should have a complete fossil record of itsancestry. |
| | The organism should produce relatively few offspring.Common descent is referred to as a theory becauseAnswer | | it's an idea from more than 100 years ago and thus is not a modernidea. |
| | it's the only idea about life on Earth that can be tested by observation of the material universe. |
| | there is complete evidence to support it from many areas of biology. |
|| it's one of several equally likely possibilities to explain the diversity of life on Earth. |
| | scientists are reasonably sure it's true, but there's little evidence to support it.Which of...