How are the flagella and cilia alike? a. they break down substances b. they assist with movement c. both to produce energy d. both store of cellular materials

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

Compare the composition of the moon's surface with the composition of the earth's surface.