Answer:
B(affected by genes and the enviroment)
Explanation:
if you had gotten this from study island then that should be the right answer. i see that you put the actual question up but not the answers lol, hope this helps
The reason is they are afraid of being picked on by a bigger crowd therefore increasing their chances to be bullied
Answer:
Planarian stem cells are known as neoblasts. The nature of the neoblasts and the processes that occur as regeneration is activated and carried out are still being investigated.
Explanation:
Humans also have stem cells, but to a more limited extent than planarians. The cells have a characteristic known as potency and are classified as follows:
Totipotent stem cells can produce every type of cell in the body plus the cells of the placenta.
Pluripotent cells can produce every type of cell in the body but not the cells of the placenta.
Multipotent cells can produce several types of specialized cells.
Unipotent cells can produce only one type of specialized cell.
The stem cells in planarians are pluripotent (or at least the ones that have been studied are). There are so many of them throughout the body that even a small piece of a planarian contains the cells.
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