<span>The guanine percent is 30. This is because the other 30% of the 60% is cytosine. Getting back to adenine, it always partners up with thymine. So it would be 20% thymine and 20% adenine, add those portions to the 60% of the other two, mentioned above and you have 100%.</span>
Primary succession is beginning.
Primary succession is when a disaster destroys the environment, leaving no soil and no organisms left. This is evident by the bare rock. Lichens are a pioneer species, meaning they are one of the first organisms that show up.
The best answer would be the first statement. The first sentence which is 'water pollution causes a decrease in fish populations in a river.' illustrates how human <span>activities can most directly change the dynamic equilibrium of an ecosystem.</span>
Answer:
D
Explanation:
Sample D will undergo the fastest rate when subjected to chemical weathering.
What is weathering?
- It is the physical disintegration and chemical decomposition of rocks to form sediments and soils.
- Physical weathering is also known as mechanical weathering. It entails breaking rocks into smaller sized chunks.
- Chemical weathering is the decomposition of rocks by chemical action.
From the given choices, option D will have the largest surface area exposed to chemical actions. It has more surface area compared to the others. The more broken a mass is, the more its surface area is.
Reaction rates are affected by:
- Increase in surface area
- Increase in temperature
- Higher concentration
- Increase in pressure
The last cube has the highest surface area and will have the fastest rate of weathering.
Answer:
Bacteria, fungi, yeast, cows, dogs, humans are all heterotrophs. They all depend on plants and other animals for their food.
