Posing scientific questions, using models to analyze situations, and selecting data are important skills in AP Chemistry. These practices can be applied to topics such as the origin of life on Earth and the active movement of molecules across membranes.
In science, particularly in Chemistry, students are often encouraged to pose scientific questions and use representations and models to analyze situations or solve problems. This is both a qualitative and quantitative practice. For instance, in studying the origin of life on Earth, students are able to pose scientific questions based on hypotheses and evaluate such questions.
Another example would be understanding the active movement of molecules across membranes. Here, models can be constructed to show the connection between this movement and membrane structure and function. Such a model would be useful in investigating whether dynamic homeostasis is maintained by this movement.
Lastly, selecting the right kind of data needed to answer scientific questions about how organisms respond to changes in their external environment is also a key skill. This justification can be based on experiments using different chemicals or conditions, such as AZ and DIDS in photosynthesis.
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The factors are: The size of the sample, the extraction method, the method of purification and preservation of the DNA.
The quantity and quality of DNA can be greatly improved by performing PCR.
* Purification of nucleic acids is a key step for functional studies in biology. Because of the great diversity of living organisms in nature, purification becomes a real challenge for researchers, especially cell lysis.
The evolution of lysis methods has made it possible to improve efficiency, speed and simplicity. But, this lysis step remains a crucial step for the efficiency and the quality of the purification.
Can you please help me with this, that'd be great! Thanks!
The correct answer is insertion mutation.
The mutation is defined as the change in the DNA (deoxyribonucleic acid) sequences. The insertion mutation is a type of mutation, in which the insertion of the nucleotides takes place in the DNA sequences, resulting in an increase in the total number of base pairs in the DNA sequence. So, the insertion mutation has resulted in the increase in the base pairs in this case.
Capillary action pulls water into the root of a tree while the forces of cohesion and adhesion continually move the water up the tall tree.
Water is a polar molecule. Strong hydrogen bonds hold the water molecules together. This is a kind of dipole - dipole interaction and it accounts for the cohesive forces in water.
The forces of adhesion bind water to other surfaces. In the case of plants, the adhesive forces facilitates the interaction of water with the xylem cells.
Water enters into the roots of plants by capillary action. Capillary action alone is insufficient to move the water up the tree.
Hence, the forces of adhesion and cohesion, acting together can help water molecules to move up the top of a tall tree.
Learn more: brainly.com/question/1641876
Answer:
Explanation:
Picture a root like a straw.
The chesion between individual water molecules causes water to move together while The adhesion forces between the water molecules and the inner walls of the tree is stronger than gravity so this cause the water at the root to rise, this is called capillary action.