Is the sternum an irregular bone?

What is needed for most chemical reactions and makes up 70% of cells

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals.

Scientists have debated the evolution of three life forms: reptiles, birds and dinosaurs. After many years of reviewing fossil records scientists proposed the evolutionary relationship seen above in the cladogram.

If you ate bacon and fried eggs for breakfast, the largest component of the energy would come from the?

What is the composition of humus? a) organic material b) sand and water c) subsoil d) inorganic material

The main difference between deserts and steppes is the

A researcher is comparing the genetic sequences of chloroplasts and certain cyanobacteria. what will she likely find

What is not a similarity between the male and female reproductive systems?

Which of the following is the major drawback of wind energy? A. Wind machines release harmful toxins. B. Wind machines are harmful to the environment. C. Wind machines only work when wind is blowing. D. Wind is a nonrenewable energy source.

Which of the following winds is characterized by blowing in the middle latitudes in the Northern Hemisphere from the northeast? westerlies gulf stream northeast trade winds southeast trade winds