Answer:
Placer deposits can be described as the accumulation of heavy minerals. The placer deposits are known to be formed by the effects of gravity on moving rocks.
By the process known as weathering, the heavy, valuable minerals are separated and are washed into streams. The mineral which forms by the process of placer deposit is resistant to weathering and high gravity.
Examples of these placer deposit minerals include gold, platinum etc.
Answer:
The plants from West Africa and South America were once together as one population.
Explanation:
This could be used as a source of proof for continental drift. When West Africa and South America were connected as one continent, known as Pangea, these two now existing plants were one species of plant in the genus <u>Solanum</u>. As the continents drifted apart the plants evolved separately on each continent according to their different environments. Now they are just closely related species as they have evolved more differences.
Ecosystems experience change through human activity and natural events. This is because human activity can impact changes in nature, like climate for example. As a result, ecosystems change in response to the change in nature or natural events, which was caused by human activities. They are interrelated so to speak.
the answer is Ocell because a cell is the building block of all things
Answer:
Vitamin C is an antioxidant and essential nutrient that has many functions. For example, it helps produce collagen, reduce oxidative stress, and enhance wound healing. Fresh fruits and vegetables are good sources of vitamin C.
Vitamin C, also known as ascorbic acid, has several important functions. These include: helping to protect cells and keeping them healthy. maintaining healthy skin, blood vessels, bones and cartilage.
People who get little or no vitamin C (below about 10 mg per day) for many weeks can get scurvy. Scurvy causes fatigue, inflammation of the gums, small red or purple spots on the skin, joint pain, poor wound healing, and corkscrew hairs