D. He has an aerator that pumps bubbles into the tank
They might go extinct if they can't keep up with the competition
Answer:
Due to presence at early days of the planet.
Explanation:
We only find the remains of single celled organisms in the oldest fossils because the single celled organisms are the organisms that were present in the early days of this planet. These single celled microbes were present about 3.7 billion years ago while on the other hand, the oldest rocks are only a little older i. e. 3.8 billion years so these single celled organisms are considered as oldest fossils on this planet.
D because gravitational force cannot pull or push
The main difference between Exponential growth and Logistic growth is that logistic growth takes into account carrying capacity. On a graph, logistic growth levels off as it nears carrying capacity while exponential growth does not.
Exponential growth involves a positive feedback loop and Logistic growth involves a negative one.
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