The distinction between sponges and other animal phyla is based mainly on the absence versus the presence of

The picture showed normal blood cells which are around and sickle cells which appear much longer people with sickle-cell suffer from the sickle cell anemia which is inherited diseaseit is caused by a change in gene responsible for production of hemo goblin this type of change is known as an

Give examples of selective advantage of organism’s body part/organ

What is the difference between a scientific hypotheses and a scientific theory?