A horse and a donkey can mate with each other. Their offspring, called a mule, is not fertile. Do horses and donkeys belong to the

same species? Explain your answer.

A relationship in which one species benefits and the other is unaffected is called

Scientists can explore whether two different animal species have evolved from a common ancestor, using evidence

Where can electrical signals that cause the heart to beat originate from

Przyjrzyj siê zdjêciom a nastêpnie zapisz zgodnie z przyk³adem w jakiej formie wystepuj¹ przedstawione na ich rosliny okrytonasienne

Suggest how the reflex action of the eye to bright light is useful to the body.

How do sexual and asexual reproduction differ in inherited genetic material?

What happens when the number of organisms in an environment is higher than the carrying capacity? O A. The population will increase quickly. O B. The population remains the same. O C. The population will decrease. O D.

Which of the following steps is usually done right before experimentation in the scientific method of investigation? Construct a hypothesis Ask a question Do background research Analyze data and draw conclusions

The body's main sources of energy are carbohydrate and fat. at times, protein can serve as an energy source in which the liver removes an amino group from the amino acid. what is this process called

Name the four classes of organic compounds containing carbon