The answer is D! birds have to migrate for winter to find an abundance of food! they learned this over time making it a learned adaptation
Ribosomes and Endoplasmic Reticulum. Ribosomes are the organelles responsible for protein translation and are composed of ribosomal RNA. So, the answer has to be A and C.
Answer:
Folds are usually formed by Compression
Explanation:
Compression has to do with applying force to a material or substance to give another shape, in order to get a fold compression is used.
Most organisms rely on the sun as a primary source of energy