<em>A circadian rhythm /sɜːrˈkeɪdiən/ is any biological process that displays an endogenous, entrainable oscillation of about 24 hours. These 24-hour rhythms are driven by a circadian clock, and they have been widely observed in plants, animals, fungi, and cyanobacteria.</em>
the correct answer is a)I only
The 21 amino acids can be arranged in many different ways. It is possible with just this small number of amino acids to create thousands of different types of proteins. Think of amino acids like they were little connecting blocks, such as legos. You have 21 of them before you. How many different ways can you arrange them? The formation of protein is similar.
The first real dissections for the study of disease were carried out about 300 BCE by the Alexandrian physicians Herophilus and Erasistratus, but it was the Greek physician Galen of Pergamum in the late 2nd century CE who was the first to correlate the patient’s symptoms (complaints) and signs (what can be seen and felt) with what was found upon examining the “affected part of the deceased.” This was a significant advance that eventually led to the autopsy and broke an ancient barrier to progress in medicine.
Answer:
C.) a possible explanation or answer to a scientific question that is based on prior knowledge or research and is testable
I think it would be D hope this helps
