It is a particularly hot,dry summer.The town has banned excessive water use and so you cannot water your lawn.After a few weeks the grass has gone brown,except a few patches where the grass seems to be doing fine.You notice that this grass has a broader leaf and is not the same species as most of your lawn.You conclude that this grass is a

Question

Quizplus · Accepted Answer

C₄ plants are more efficient at photosynthesis in hot and dry conditions than C₃ plants, as they can capture and store carbon dioxide more effectively. They tend to have broader leaves, which explains why the grass with the broader leaves is doing fine. C₅ plants do not exist, and CAM plants are adapted to arid conditions but have a different photosynthetic pathway than C₄ plants. The fact that the grass is a different species than the rest of the lawn suggests that it is not a mutant.

It Is a Particularly Hot,dry Summer