Vegetable farmers often plant soybeans every few years. rotating crops breaks up the life cycles of many insect pests, and the soybean plants provide the soil with nitrogen. other crop plants need the nitrogen to grow well. a field of soybean seeds has been planted on a farm in indiana. as soon as the first leaves emerge from the seed, photosynthesis begins. which substance is the chemical food source for the soybean plants?
a. sunlight
b. glucose
c. carbon dioxide
d. water

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?

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

What is the 77 element on the periodtic table