Sharks, whales, and dolphins share similar features such as body shape and the position of fins. however, sharks have gills for breathing. while whales and dolphins have lungs. these differences indicate that the organisms share a common ancestor for whales also possess a vestigial pelvic bone. the presence of the pelvis bone may indicate that whales

Thus, the presence of the pelvic bone may indicate that whales had ancestors that walked on land.  

Explanation:

Evolutionism claims that whales have pelvic bones (hips) that are evolutionary remains from when their ancestors walked the earth more than 40 million years ago. The commonly accepted hypothesis considers that these bones are simply vestigial, regressing slowly over time. At the definition level, 'vestigial organs' originally referred to useless parts of the body that were left over from some evolutionary ancestor

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.