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Water’s unique property of having a lower density as a solid (ice) than as a liquid is crucial for aquatic life. What is the primary reason for this phenomenon?

You notice that your houseplant’s leaves are turning yellow. You hypothesize that it’s not getting enough water. You then decide to water it more frequently for a week to see if the leaves return to their normal color. This process is an example of ______.

How do large, charged molecules like amino acids typically cross the plasma membrane?

What is the main focus of phylogeny in biological studies?

A biologist is studying how different types of cells, such as muscle cells and nerve cells, combine to form structures with specific functions in the human body. At which level of biological organization is this biologist primarily working?

Which of the following is a defining characteristic of a prokaryotic cell?

Which of the following macromolecules is characterized by a diverse range of structures, often containing long hydrocarbon chains, and is primarily hydrophobic?

SARS-CoV-2, the coronavirus responsible for the disease COVID-19, contains an RNA genome surrounded by a protein capsid (coat) and a lipid envelope (membrane). Its spike proteins enable it to bind to ACE2 receptors of epithelial cells, allowing it to gain entry. Once inside, the virus hijacks the cellular functions and effectively turns the cell into a virus producing factory, with the synthesis of viral genome and proteins allowing virus particles to assemble and exit the cell. This overall process is representative of what viruses in general accomplish when infecting cells. Based on this information and your understanding of the definition of life, are viruses alive? Please explain. Include the following in your answer: Define the characteristics of life Identify which characteristics (if any) apply to viruses Identify which characteristics (if any) do not apply to viruses Explain your rationale for why viruses are or are not alive Your answer should be a paragraph of at least 4-5 sentences. Note that there is not a single answer to this question, but the point is to demonstrate your understanding of viruses and the definition of life!

The endosymbiotic theory proposes that chloroplasts evolved from which of the following?

What is the smallest unit of matter that retains the identity of an element?