While working with the fruit fly Drosophila, a researcher discovers a single fly that is eyeless. He decides to mate this fly with a normal fly, and surprisingly, he found that all of the 65 offspring have eyes. What did he do wrong? What could explain these results? Is there another experiment/cross he could make to produce flies expressing the eyeless allele?

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

it is a learned trait

explanation:

biology is the study of life. it is the study of living organism.

because the light is a great source of energy for the plants to survive. (i hope this )