13. which of the following statements about seafloor spreading is false? a. close to the mid-ocean ridge, there is almost no sediment. b. magma rises through the crust along the mid-ocean ridge. c. the oldest crust is closest to the mid-ocean ridge. d. continents move as the seafloor spreads along a mid-ocean ridge.

Option C, The oldest crust is closest to the mid-ocean ridge.

Explanation:

The oldest crust of sea floor is somewhere around 300 million years old. Mid-ocean ridges are the location where these crust are created and then they start moving away from each other. The continents are continuously moving away from each other since ages, hence it is for sure that the old crust would be very far away from  mid-ocean ridges.

Hence, option C is the correct answer

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.

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