The main groups of unicellular organisms are bacteria<span>, </span>archaea<span>, </span>protozoa<span>, unicellular </span>algae<span>, and unicellular </span>fungi<span>. </span>
It is B. 3 categories of fish...category Agnatha (aka jawless fish)
category Chondrichthyes (aka cartilaginous fish)
category Placodermi (aka armoured fish)
Answer:
all the living things in the forest ecosystem
Answer: differentiation
Explanation:
The stem cells of the neural region are the self-replenishing cells. These cells generate the progenitor stem cells by differentiation which further differentiate to form the neurons and the glial cells during the process of development of embryo.
The neural progenitor cells remain in restricted regions in the brain of adult vertebrate and produces neurons throughout the life time.