Answer:
Structure in a chromosome that holds together the two chromatids
Explanation:
If the snake population runs out of small animals to eat such as mice or rabbits then the snakes would starve and die unless they could move to another habitat. All of the other animals in the food web would also die due to their lack of food supplies. The populations of the consumers would fall as the population of the producer fell.
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#2 is an exponential graph, #3 is linear horizontal, #4 is like graph 1, #5 is linear upwards but slowly, #6 like number 5, #7 like number 1, #8 like number 1
Since an animal only becomes more complex, and not simpler, an ancestor to all organisms would have to be the most simple and primitive organism.