an example of a single-gene trait is

a. bands on a snail’s shell.
b. beak size in the galápagos finches.
c. length of snails.
d. fur color in cats.

which of the following explains why the edges of africa and south america fit together like two pieces of a puzzle?

a. endosymbiosis
b. biological forces
c. continental drift
d. none of the above

Turtle hatchling survivorship rate is low in many turtle species due to predation. amanda researched the predatory rate on a species of turtle eggs in the red river. the eggs were harvested from trapped turtles and the egg's cloaca film (reproductive discharge) was either washed off or left on once gathered. research suggests that predators use the female's cloaca scent to locate the eggs. the eggs were only handled when wearing gloves and then reburied along islands where the turtles were trapped. the nests were monitored by cameras and manually on foot and data on nest predation were recorded. a. based on the experimental design, what is the dependent variable? b. based on the experimental design, what is the independent variable? c. based on the experimental design, what is the control?

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

Adrought killed all the plants in an agricultural farmland. gradually, due to wind and some birds for. nearby areas, new plants started sprouting l. what stage of succession was taking place in the farmland? a) competition b) nudation c) ecesis d) reaction e) migration