Today there are fewer than 12,000 cheetahs left on the planet.

Explain, using your knowledge of natural selection, why it may be difficult to stop the decline of the cheetah population.

The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above