Answer:
All matter goes back into carbon dioxide, water, and minerals
Explanation:
Matter cannot be created or destroyed. There is a constant cycle of matter that repeats itself.
Answer:
42,5 mL
Explanation:
We need to use the serial dilution formula beacuse we start with a stock concentrate solution and we need to prepare a new less concentrated one.

<u>DF in the dilution factor, Vi is the initial volume and Vf is the final volume.</u>
The first step is to have the same measurment unit so we need to convert 345 µg to mg.
we know that 1 µg equals 0,001 g, hence:

now the final volume is 0,345 mg protein/ mL and the inital volume is 15mg protein/mL, both of them are in the same unit so we can use the formula


Now since the question said that we already have 1.0mL of the amylase stock solution we need to subtract that 1.0mL to the 43,5 mg protein/mL

So, we need 42,5 mL of diluting buffer if we want a final concentration of 345 µg protein/mL (0.345 mg protein/mL)
<span>Endoskeletons are bony forms on the inside of the body of an organism. In these cases, fish scales and bones on a human are inside the skin. These would be endoskeletal in nature. Echinoderms with plates and arthropods with appendages would be examples of exoskeletons.</span>