Contour: Gives the bird its stream line shape.
<span>Down feathers: Keeps the bird warm.</span>
Answer:
Homo erectus
Explanation:
Homo erectus is believed to be the first creature walk erect and possibly be the first hominin
<span>The different adrenal hormones show selectivity for different types of adrenergic receptors. This may be because the chemical structures of the adrenal hormones are such that binding is biochemically easier for the hormones at the receptors to which they show a selective affinity.</span>
Answer:
You did not give details, but asthma is the diffuculty of breathing and is in the respiratory tract. Diabetes, on the other hand, is when your body does not take care of the extra insulin (type 2), or when your body does not produce enough insulin and your blood sugar levels are off.(type 1)
Explanation:
