One adaptation to life in flowing water is - breeding in oceans
Adaptation is not a quick process but rather it is a slow and time taking process. It can be defined as an evolutionary process where an organism becomes increasingly well suited to living in a particular habitat. It is a feature of an organism that enables it to live in a particular habitat.
c.midrib. The petiole is a stalk arising from the stem of the plant that connects the stem to the leaf blade. In the middle of the leaf blade is the midrib, which is an extension of the petiole.
No, fish and snakes do not have ears
Every cell of the organism has the same DNA sequence and same genes. However, not all genes are expressed in every single cell at the same time. Only those genes necessary for a specialised function of a specialised cell are expressed in the specialised cell. For example, skin cells have some different proteins than nerve cells. Genes responsible for those "skin proteins" are activated in skin cells and are turned off in nerve cells.
Protein deficiency can cause muscle cramping, weakness, and soreness. If you aren't consuming enough protein, your body will start to take protein from your skeletal muscles, which will lead to your muscles wasting over time.