Use the ratio to find how much bat saliva matches 40 ml of snake blood.<br><br>
&bull; Snake blood : Bat saliva = \(10 : 25 = 2 : 5\)<br>
&bull; 1 unit of snake blood → \(5 \div 2 = 2.5\) units of bat saliva<br>
&bull; 40 ml snake blood → \(40 \times 2.5 = 100\) ml bat saliva<br><br>
Final Answer: 100