Prokaryotes lack a defined nucleus<span> (which is where DNA and RNA are stored in</span>eukaryotic cells<span>), </span>mitochondria<span>, </span>ER<span>, </span>golgi<span> apparatus, and so on. In addition to the lack of organelles, </span>prokaryotic cells<span> also lack a </span>cytoskeleton<span>. Does this help?</span>
Tropical rainforests are rich habitats for many species of animals because there are many resources available. There is a lot of water available and a lot of plants. <span> it offers lots of niches for different species. The trees are kind of like skyscrapers, with different species living at different levels and at each level there is a range of species with certain adaptations to allow them to thrive.</span>
Answer:
D. The threat of predators to eat eggs
Explanation:
The internal gestation followed by live birth was an adaptation developed by the mammals on land, and by some fish in the water, like the sharks. The mammals have been the most marking ones in this adaptation though. They too were producing eggs initially, but because they were living in an environment where there were numerous animals that preyed upon them, as well as their eggs, they had to be innovative. They developed internal gestation, where the embryo was developing inside the body of the female, and then it was born alive. This was providing extra safety, as the embryo was always with the mother, instead of being left alone and not guarded, thus an easy meal for the predators. The two types of internal gestation that the mammals developed are the placental and marsupial types, with the placental turning out to be more successful over time.
Since non-polar molecules are equally distributed and positively charged atoms in contrast with polar molecules. Thus, like fats oils and waxes, these materials are composed mainly of lipids or in the group of fats and are conspicuously insoluble with water. How do these substances interact with water? They are hydrophobic, thus, they don't "mix" with water. Unlike water and other polar molecules that are unequally and negatively distributed and charged making them able to bond with other molecules like oxygen and other polar molecules and substances.
Bacteria caused diseases i think
