One tool scientists use to learn about the weather is radar. To use radar, a weather tower sends out radio waves and then detects the waves that are reflected back to the tower. If a great number of radio waves are reflected back from a particular area, what does that tell scientists about the weather in that area? O A. There is a light sprinking of rain in the area. B. There is going to be a drop in air pressure in the area. C. There is only sunshine in the area, with no clouds. O D. There is a large amount of rain or snow in the area.​

A

Explanation:

D. There is a large amount of rain or snow in the area.

Explanation:

Signal towers are used to detect precipitation. Radio waves are sent out to then meet rain or snow, which are then reflected back to the signal tower. The more waves that are sent back, the heavier the rain or snow.

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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.