They should be carbohydrates, fats (lipids) and protein. they are labelled as primary food substances and they're essential to life. they can provide energy and raw material for life processing. although mineral ions and vitamin are important too, but they only need a small amount.
A shield<span> is generally a large area of exposed Precambrian crystalline igneous and high-grade metamorphic rocks that </span>form<span> tectonically stable areas. In all cases, the age of these rocks is greater than 570 million years and sometimes dates back 2 to 3.5 billion years.</span>
The Union struggled to take Vicksburg from the Confederacy because the fort was<span> located on top of a hill and surrounded by swamps. The correct option among all the options that are given in the question is the first option or option "A". I hope that this is the answer that has come to your desired help.</span>
Osmosis is the movement of water across a semipermeable membrane, from an area of lower concentration to an area of higher concentration. <span>The process is hypertonic because the solution pulls fluid from the cells.
</span><span>When a semipermeable membrane separates two bodies of fluid dissolved particles can pass through the membrane.</span>
When one of the links (species) in a food chain is no longer present (for example a species goes extinct or a feral animal takes over), the food chain breaks. Sometimes, this can cause other animals in the food chain to disappear as well and the whole ecosystem can become imbalanced or even collapse.
