Dinosaurs existed 4 the same reason that any other animal has existed or does exist. The dinosaurs evolve and were well adapted that they survived 4 millions and millions of years!
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<span>By producing melanin (pigment), the skin protects the underlying structures from ultraviolet light's harmful rays while producing vitamin D, which works with calcium for multiple body processes.
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Vitamin D is produced by the skin when it is exposed to the sunlight. Ultraviolet B (UVB) is the part of the sun's rays that affects the skin to produce such vitamin.
Answer:
A. Mobility
Explanation:
That Organism is a Prokaryote, The strings behind it helps the organism move around. If it didn't had those strings, the prokaryote would float around and it would have a hard time finding food to consume and survive.
Answer: C). Neurons
Explanation:
Neurons are the specialized cells present in the brain. These cells play an important role in processing and transfer of information generated as a response to stimuli. The neurons have specialized parts which recieves the signals from dendrites and send the signal to other neuron by axon. In this way transfer of information takes place from cell to cell.
