Answer: a star expels most of its outer material until only the hot core remains, which then settles down to become a young a white dwarf
Explanation:
Centrioles is the organelle.
Answer:
the ventral respiratory group
Explanation:
The respiratory centers are present in the brain stem. Five major respiratory group are Dorsal respiratory group, Ventral respiratory group, Pontine respiratory group, Pneumotaxic center and Apneustic center.
Ventral respiratory group controls the process of respiration. The neurons of ventral respiratory group become active during forceful breathing and may result in inspiration.
Thus, the correct answer is option (A).
Answer:
Scientists use observation to collect and record data, which enables them to construct and then test hypotheses and theories.
Explanation:
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