What characteristic distinguishes sponges from other animals?

What defines a mammal and distinguishes it from other vertebrates?

During urine formation, what happens to a substance that is not filtered or reabsorbed, but secreted?

What is the function of low-density lipoprotein (LDL)?

Which of the major adaptations of angiosperms is most vulnerable to herbivore attack, especially by insects?

What are the three domains currently used in classification schemes?

It is possible to imagine the various levels of taxonomic classification as a kind of “family tree” for an organism. If the kingdom is analogous to the trunk of the tree, which taxonomic category would be analogous to the large limbs coming off that trunk?

What is the most inclusive of the major taxonomic categories?

You are a biologist studying a natural population of mice, and you observe that, in one area, the proportion of darker-colored mice is greater than the proportion of lighter-colored mice. In another area, the opposite is true. You find that only the area with more dark mice has predators. Therefore, you hypothesize that darker mice are favored in areas with predators, perhaps because they are more difficult to see. If your hypothesis is true, what would you expect to happen in the few generations after predators are introduced to an area with a population of mice that previously did not have predators?

Which of the following would have prevented the evolution of life after Earth was formed?