A. the first cell is in anaphase l, and the second cell is in anaphase ll
Grassland soils are very fertile and nutrient-rich because of the growth and decay of deep grass roots. The rotted roots provide a food source for living plants.
It's 4 because 6-2 equals 4
<u><span>Ecologist study the varieties and interactions of organisms and their environment. </span></u>
Answer;
2) the rate at which changes occur in a type of molecule
Explanation;
The molecular clock is figurative term for a technique that uses the mutation rate of biomolecules to deduce the time in prehistory when two or more life forms diverged.
Scientists can use relaxed-clock methods to deal with variation in the rate of the molecular clock. By measuring the patterns of evolutionary rate variation among organisms, they can also gain valuable insight into the biological processes that determine how quickly the molecular clock ticks.
