Electrical synapses, I believe.
Think it’s answer D but it maybe B
hope this helps!!
sorry if it’s wrong
When two react with two fatty acid molecules a digylceride forms. And when three react with three fatty acid molecules a triglyceride forms. Triglycerides formed <span>between glycerol and unsaturated fatty acids are usually oils. Those </span>formed<span> with saturated acids are usually fats.</span><span />
The correct answer is letter D. These beetles have an adapted structure. This refers to traits that they have inherited from their ancestors gene pool. Overtime the need and function for these structures are not needed by beetles in their overall survival, but the genetic code remains in their system which still gives birth to their wings that are not used anymore because of the new type of adaptation that they are going through.