Which is an example of positive phototropism?
a: plant root growing down into the soil
b: plant root growing up out of soil
c: plant shoot growing down into the soil
d: plant shoot growing up out of soil

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a. control b. hypothesis c. procedure d. system

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.

True or false multiple lane changes must be done individually going through the same procedures for each lane change