The answer to this question is B.
The greater 'mass' a moving object has, the more kinetic energy it has.
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Answer:
According to the diagram and the interaction of the structures to express information in the cell, it is true that:
- Molecule B can be used to produce molecule A.
- Molecule A can be used to produce molecule C.
Explanation:
Molecule A is a double stranded DNA, molecule B is a strand of RNA and molecule C is an amino acid encoded by a codon.
The DNA is capable of splitting and from one strand producing the messenger RNA, in the process of transcription.
Messenger RNA contains a sequence of bases, and the set of 3 bases of RNA form a triplet or codon. A specific amino acid can be formed from a codon. This process is called translation.
The way in which molecules A, B and C interact is through the processes of transcription and translation, making it possible to use genetic information for protein synthesis.
The other options are not possible because:
- <em>Only DNA can replicate, RNA needs the transcription to be synthesized.
</em>
- <em>Molecule B and C do not interact so that the amino acids are together, but this depends on the sequence of bases in the RNA.</em>
Answer:
This study was focused on an Ecosystem level, as it involved soil properties and above-ground vegetation interacting with mentioned soil physic properties.
Explanation:
Ecological studies can be performed at different hierarchy levels:
- <u>Organism</u>: This is an individual physiologically independent from other individuals. At this level, it must be understood <em>how an organism survives</em> under certain changing <em>physic and chemistry conditions</em>, and how it <em>behaves</em> to reproduce, avoid predators, and find food.
- <u>Population</u>: Groups of individuals from the same species, with similar characteristics, capable of crossing, leaving offspring that live in the same habitat at the same time. At this level, it is interesting to know the <em>size of the population required to leave fertile offspring</em> that ensure the population will <em>survive over time</em>. It is also interesting to know <em>genetic variability </em>that allows <em>evolutive adaptation </em>to environmental changes.
- <u>Community</u>: Relationship or interaction between different species groups that live in the same habitat and at the same time. At this level, it is interesting to study <em>inter-specific interactions</em> that could cause <em>changes in the populations´ size</em>. These could be the cases of competition, predation, parasitism, mutualism, and etcetera.
- <u>Ecosystem</u>: Basic interaction unit between population and environment that turn in complex relations existing between living and non-living elements in a given area. In the example, interactions between recovering vegetation and soil properties, as non-living elements.
<span>Making a hypothesis is a vital part of the scientific method, one of the bedrocks upon which the entire practice rests. Being able to look at the world and create "if this, then that" statements that can be linked together and tested is what gives the scientific method credibility and makes it able to be replicated by all who practice it.</span>
