DNA
ribosomes
mRNA
amino acids
Nonrenewable resources like oil, natural gas, and coal are efficient and economically viable due to established infrastructure. However, they have environmental impacts and are finite.
The question asks about the advantages of using nonrenewable resources. Nonrenewable resources such as oil, natural gas, and coal, have several advantages. One significant advantage of nonrenewable resources is their efficiency. These types of resources are often much more efficient in generating energy than renewable alternatives. For example, a small amount of coal or nuclear energy can produce substantially more energy than solar or wind power. Furthermore, nonrenewable resources are currently more economically viable. The infrastructure for extracting and using these resources is well established, making them cheaper to use in the short term as compared to renewable sources. However, we need to be aware of the environmental impact and the fact that these resources are finite and will eventually run out.
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(1) contraction of muscle tissue
(2) protein synthesis in a cell
(3) active transport of minerals
(4) movement of water across a membrane
Answer;
-Movement of water across a membrane
Explanation;
-Movement of water molecules across a membrane is an example of passive transport . Passive transport involves movement of ions and other atomic or molecular substances across cell membranes without need of energy input.
-Unlike active transport, passive transport does not require an input of cellular energy (ATP). Examples of types of passive transport are osmosis and diffusion.
The gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. The gray frog was abundant in the woodlands. Because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. In such a case, the
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The gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. This suggests that speciation occurred because of
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Answer:
the speciation of the gray tree frog and the green tree frog in the given scenario is likely a result of natural selection caused by the change in habitat from woodlands to grasslands, leading to differences in their mating calls.
Explanation:
the change in the environment from woodlands to grasslands due to climatic changes led to speciation, resulting in the gray tree frog and the green tree frog having different mating calls. This suggests that speciation occurred because of natural selection.
Here's an explanation of how this process might have occurred:
1. Initially, both the gray tree frog and the green tree frog shared a common ancestor and had similar mating calls.
2. When the climatic changes caused most of the trees in the region to die, the woodlands transformed into grasslands.
3. This change in habitat created a new selective pressure on the tree frogs. The gray tree frogs, which were adapted to the trees in the woodlands, faced difficulties surviving in the new grassland environment.
4. However, the green tree frogs, which had a broader habitat range and could survive in both woodlands and grasslands, were better suited to the new environment.
5. Over time, the gray tree frog population in the grasslands declined, while the green tree frog population thrived.
6. As the populations became isolated from each other, natural selection acted on the genetic variations present within each population.
7. The different mating calls between the gray tree frog and the green tree frog might have developed as a result of sexual selection. Frogs with mating calls that were most attractive or effective in their respective environments were more likely to reproduce and pass on their genetic traits.
8. Eventually, the genetic differences between the gray tree frog and the green tree frog became significant enough that they were considered separate species