I believe it's D don't take my word for it.
This is false. Organisms may play several important roles in an ecosystem. Consider for example and ocean shore environment occupied by a particular species of crab. The crabs are scavengers and eat any organic matter they encounter. They therefore play an important role in the cycling of nutrients in the ecosystem. The crabs are however also an important source of food for a range of other species occupying the same habitat, including octopi, certain fishes and sea otters. Therefore, the crabs are an important part of the food web in the ecosystem. Many species similarly occupy multiple important roles in an ecosystem.
Answer:
The answer is A.
Explanation:
To test if the selenium from the mine has an effect on the fish living in the lake which i assume is close to the mine, testing the tissue of the fish from that lake and comparing it to the selenium levels of the fish from a nearby lake would be a testable hypothesis because there is a comparable aspect and there should be a difference in the numbers between the fish from the two lakes because of their distance to the mine.
I hope this answer helps.
Answer:
I'm a bit confused with the question... it is worded weird.
Explanation:
By the looks of it the controlled variable is how far you dip the paper towel in the water, the independent variable is the bowl filled with water, and the dependent variable is the water climbing up the towel.
FYI: I'm not 100% positive, but I'm pretty sure these are correct for the most part. Sorry I couldn't be more help!
I am blue.
Not a smurf.
But a blue delinquent from RobIox Arsenal (random poem btw)
