Astudent forms the following hypothesis: if people wear bright colors, they will be happier. what is/are the problem(s) with this hypothesis?

Hypothesis refers to a recommended explanation or a supposition developed on the foundation of confined evidence as a starting point for further testing. In the given case, there is no scientific proof to support the mentioned claim.  

The student is not even indicating about the colors that are needed to be worn to stay happier, he or she has only suggested or recommended about the bright colors, without any kind of specification. This indicates an issue with the hypothesis, as there is an assortment of things.  

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.