The century cactus flowers every 100 years. A similar cactus flowers every 50 years. If the 50-year cactus pollen has the correct characteristics to fertilize the century cactus, which reproductive barrier will most likely be working against that possibility

What is one benefit of a nonrenewable resource, such as natural gas? a. generate large amounts of electricity b. less expensive overtime c. produces pollution d. will run out eventually

The images show fossils of a modern bird and two extinct organisms (a tyrannosaurus rex and an archaeopteryx). based on the structure of the three organisms, it can be concluded that . the archaeopteryx and bird have wings, while dinosaurs have limbs. so, it can be concluded that .

As a small change in a person's dna can cause a genetic disorder