Answer:
The physical and chemical properties of seawater vary according to latitude, depth, nearness to land, and input of fresh water. Approximately 3.5 percent of seawater is composed of dissolved compounds, while the other 96.5 percent is pure water. The chemical composition of seawater reflects such processes as erosion of rock and sediments, volcanic activity, gas exchange with the atmosphere, the metabolic and breakdown products of organisms, and rain.
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Answer:
C. cell membranes
Explanation:
the black/dark material that is visible in many of these onion cells is cell membranes.
Answer:
evaporation i think but im not sure
Explanation:
The answer is B: 'the smoke that results is toxic'. An example is the burning of domestic garbage, which remains a common practise, particularly in developing countries. This practice can release g<span>reenhouse gases like carbon dioxide and also tiny particles and toxic chemicals that can harm human lungs.</span>
Answer:
Number 1. the flower; it has a reproductive function. They are the reproductive organs of the plant. They mediate sperm contained within pollen, to the ovules contained in the ovary.
Number 2. the leaf; their primary function is photosynthesis -manufacturing food for plants
Number 3. the stem; it's function is to provide support for leaves and flowers, they conduct water and nutrients from the roots and food in the form of glucose from the leaves to other plant parts.
Number 4. the roots; their function is to absorb water and minerals from the soil, anchor the plant in the soil and to store extra food for future use.
Explanation:
Hope this was helpful.