The two-layered sac surrounding the heart is the pericardium.
Hope this helps!
Answer:
b or c
Explanation:
The water will move to the section with lower water concentration until it is balanced, however, I don't know which section has the sugar and which has the water. a is wrong because the membrane is semi-permeable, so water can go through, and d is wrong because it is provided the sugar cannot move across the membrane. Hope this helps some :)
Have you ever watched a caterpillar turn into a butterfly? If so, you're probably familiar with the idea of alife cycle<span>. Butterflies go through some fairly spectacular </span>life cycle<span> transitions—turning from something that looks like a lowly worm into a glorious creature that floats on the breeze. Other organisms, from humans to plants.</span>
