Answer: A). Flatworms
The illustration shows planaria which is a free living organism. It has flat shape and simple structure. This animal belongs to group of Flatworms. The flatworms do not have well developed respiratory and circulatory systems, these are simple organisms which derive the oxygen and nutrients by diffusion.
Line of symmetry to split the circle into a half.
Answer: Metal
Explanation :Metals are often shiny (luster) , malleable, ductile, and can conduct electricity.
Hope this helps.
Homogeneous mixtures are also known as solutions and have uniform properties
Well there is Google for a reason. "Definition of nucleic acid". "What is nucleic acid". I'll give you the definition though. A complex organic substance present in living cells, especially DNA or RNA. The molecules consist of many <span>nucleotides linked in a long chain.</span>
