Read the excerpt from The Evolution of Useful Things. Which statement best describes the relationship of ideas in this text?

The ancestors of horses possessed feet with five digits. over time, with the development of grasslands, the digits fused and formed hooves. what evolutionary advantage did this transformation serve? a. it allowed them to climb rocky surfaces with ease. b. it allowed them to graze better. c. it enabled them to run faster from predators. d. it let them see clearly through the grasslands. e. it made them taller.

How many liters of 60% alcohol solution should be added to 40 liters of a 20% alcohol solution to make a 50% solution?

What kind of interaction is depicted in the image? a. intraspecific, direct b. intraspecific, indirect c. interspecific, direct d. interspecific, indirect e. invasion