Not sure if there is enough information but here goes:
It is definitely:
not A: The question does not state that pollution affected the other populations so you can't assume that.
not B: a decrease in competition would lead to an INCREASE in numbers, not decrease.
maybe D, but probably not: this answer would mean that the different fish populations are not likely to affect each other; in a stable ecosystem that is unlikely.
best answer C: decreased competition for resources would likely increase the availability for other organisms in the ecosystem.
Hope this helps!
Answer:
Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material.
Explanation:
Answer:
True.
Explanation:
The Chargaff's rules indicate that in the DNA of all living organisms the amount of adenine (A) should be equal to the amount of thymine (T), while the amount of guanine (G) should be equal to the amount of cytosine (C). These rules were useful to describe the structure of the double helix and also enable to describe base patterns that often are associated with specific gene regions (for example, promoter regions are rich in AT). Moreover, an imbalance in the 1:1 equilibrium ratio is associated with mutations that may cause diseases such as cancer.