<span> the error occurs at random during the formation of an egg or sperm.</span><span>Down syndrome is caused by a random error in cell division
</span>
A. Adaptations
A behavioral adaptation is a change affecting the way an organism naturally acts. This type of adaption could be caused by a change in the surrounding environment or the actions of another species. For example, predatory animals might start hunting in packs -- giving them an evolutionary advantage over solo hunters.
A prediction in a controlled experiment allows researchers to form hypotheses and anticipate the results of an experiment. So your answer is D.
They are called: The Lymph nodes, spleen, and the thymus glands are collectively.
I hope that helps
Answer:
:the natural process of bone formation.