Bob rides his motorcycle 231 km in 3 hours. What is his average speed in kilometers per hour?

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.

Which of the following is not a benefit of genetically modified foods? a.pest-resistant crops b.herbicide-resistant crops c.plants that do not require water?