1. this has a definite pattern of variation with respect to latitude. which of these is it?

a. temperature
b. density
c. ph
d. salinity

Temperature has a definite pattern of variation with respect to latitude. As you go to the poles it gets colder and as you get closer to Equator it gets warmer. The answer to your question is A. I hope that this is the answer that you were looking for and it has helped you.

Glucose, also called grape sugar, blood sugar or corn sugar, is among the simplest and one of the primary naturally occurring sugars. produced naturally by plants as the primary photosynthesis product, it is heavily used by living beings as a main energy source and is necessary for cellular respiration. chemically, it is a monosaccharide carbohydrate and serves as a building block for complex sugars like starch.

D. asparagine–glycine–tyrosine