Organelles<span> are found only in eukaryotic </span>cells<span> and are absent from the</span>cells<span> of prokaryotes such as bacteria. The nucleus, the mitochondrion, the chloroplast, the Golgi apparatus, the lysosome, and the endoplasmic reticulum are all examples of </span>organelles. Vital organs. Humans have five vital organs that are essential for survival. These are the brain<span>, </span>heart<span>, kidneys, </span>liver<span> and lungs. The human </span>brain<span> is the body's control center, receiving and sending signals to other organs through the </span>nervous system<span> and through secreted hormones.</span>
The answer is B. all the others are formed by deposition
Tropical ecosystems provide a more open weather and climate than temperate zone ecosystems. Many Tropical ecosystems have a moderate climate the mostly stays the same, which allows most animals in that habitat to have comfort, rather than migrating.
