The graph shows an approximation of the predicted life expectancy of a main sequence star based on its mass. Our Sun is a main sequence star with a mass of approximately 1.9 x 1030 kilograms.
Current estimates put its age at around 4 billion years. Which of the following is the most reasonable
prediction of how many more years our Sun will last

Animal bodies (and even plant bodies for that matter) are complex enough that life couldn't exist without enzymes. enzymes are usually large, complex biological catalysts that are expensive to make. enzymes speed up the rate of chemical reactions without being used up during the reaction (they can be reused many times). they are highly specific in the reactions they regulate. knowing what enzymes are and how they function, why does this explain why complex life forms could not exist if there were no enzymes.

As a result of wildfires, in grasslands. a) tree growth increases b) grass growth increases c) soil quality decreases d) invertebrate variety decreases

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line