Commensalism is a situation in nature where there is an association between two organisms that benefits one but does not help nor harm the other.
Let's go through each example in order to find one with commensalism.
A). Honey bees that feed on the pollen of cornflowers and help the flowers reproduce.
This is not a form of commensalism as both organisms mutually benefit from the association.
B). Barnacles ride on a gray whale's back to obtain food, and the whale is not harmed.
This is a form of commensalism. The barnacles benefit from riding on the whale's back as they obtain food. The whale is also unharmed in the process.
C). Squirrels and chipmunks eat the same nuts in a forest where food is scarce.
This is not a form of commensalism as neither organism benefits. There is an increased competition for food that harms both of the organisms.
D). Prairie dogs often collect and eat food in groups so they are better protected from enemies.
This is not a form of commensalism as the interaction of the organisms is within the same species. In order for commensalism to take place, two different species must interact.
The best example of commensalism is B.
Answer:
It is the Endocrine System.
Explanation:
The Endocrine System controls and regulates almost all the hormones in your body.
Integumentary System = Skin Tissues
Excretory System = Release of Waste out of the Body
Digestive System = Breakdown of Food
The Sample Size formula, also known as the Cochran Formula, allows for calculation of an ideal sample size. Below, I have inserted a picture of the formula, where it’s variables are as follows,
N=population size
E= margin of error
Z=z-score
The answer is A hope this helps .................................................just to fill in some space
