10. (Choose ALL that apply) Select the TRUE statements about how organ 3 points systems in the body interact with each other (choose all that apply): 1. The respiratory system breaks down food into nutrients which are brought to the rest of the body through the excretory system

2. The digestive system breaks down food into nutrients which are brought to the rest of the body through the circulatory system

3. The digestive system includes muscles to help move food through the esophagus, stomach, and intestine

4. The nervous system directs and controls how the muscular system moves the body​

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

Nonpoint source pollution is difficult to control because it