A) a common ancestor
Homologous structures are structures that are similar in related organisms. There is a basic pattern of bones which can be inherited from a common ancestor
Answer: Option "D".
Explanation: During exercise muscle cells release irisin protein is being released causing Beige adipocyte formation.
the secretion of Irisin leads to the improvement in muscle activity, bone mineral density, increasing the formation of brown like Beige adipocytes in the tissue.
Adipocytes are divided into two tissues namely white and brown. white tissues generally expand during excessive nutrition and brown adipocytes have mitochondria and burn the energy during exercises resulting into the break down of ATP molecules increasing the body heat.
Therefore, during exercise heat generated due to the formation of brown adipocyte tissue which are formed due to the release of irisin protein.
the answer is B. grasp the loose skin on the back of its neck
Answer: The Answers are, A: happens all the time, D: can be caused by genetic drift, and E: can be caused by natural selection.
