Some grass species use the C3 photosynthetic pathway and other grass species use the C4 photosynthetic pathway. As you move from North Dakota to Texas, explain why you think the percentage of grass species using the C4 photosynthetic pathway would increase, decrease, or stay the same.

would increase

Explanation:

C3 plants are those where the first carbon compound produced during photosynthesis have three carbon atoms per molecule (instead of 4 in C4 plants). While higher is temperature and light, oxygen (O2) exhibits a higher affinity for Rubisco, a key enzyme in photosynthesis. In environmental conditions with high temperatures and light such as, for example, Texas when this state is compared to North Dakota, C4 plants tend to be more productive than C3 plants (because these plants have different metabolic pathways). Thus, it is expected that the percentage of C4 plant species in the local grass flora increases as latitude decreases.