Problemas
1. What is the basic unit of life? 2. What are the eight characteristics of life? 3. Are viruses considered biotic or abiotic? Why? 4. Explain the two ways viruses reproduce. 5. What are the three domains of life?
Roztwór
Sandra
veterano · Tutor durante 12 años
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(280 Votos)
Respuesta
1. The basic unit of life is the cell. Cells are the smallest units that can be considered alive and are the building blocks of all living organisms.2. The eight characteristics of life are: - Cellular organization: All living organisms are composed of one or more cells. - Metabolism: Living organisms undergo chemical reactions to produce energy and maintain their internal environment. - Homeostasis: Organisms maintain a stable internal environment despite changes in the external environment. - Growth and development: Organisms grow and develop according to specific instructions coded in their DNA. - Reproduction: Organisms produce new individuals that are genetically similar to themselves. - Response to stimuli: Organisms respond to changes in their environment. - Adaptation through evolution: Organisms evolve over time to better adapt to their environment. - Heredity: Traits are passed from parents to offspring through genes.3. Vir be neither biotic nor abiotic. They are considered to be on the borderline of living and non-living. Viruses do not have cellular structures and cannot carry out metabolic processes on their own. They require a host cell to reproduce and carry out their functions.4. Viruses reproduce in two main ways: - Lytic cycle: In this process, the virus enters a host cell, replicates its genetic material, and then causes the cell to burst, releasing new virus particles. - Lysogenic cycle: In this process, the virus integrates its genetic material into the host cell's DNA and remains dormant. The viral genes are replicated along with the host cell's DNA when the cell divides. The virus can remain dormant for a long time or can be activated to enter the lytic cycle.5. The three domains of life are: - Bacteria single-celled organisms without a nucleus. They are found in various environments and play important roles in ecosystems and human health. - Archaea: These are also single-celled organisms without a nucleus, but they have distinct genetic and biochemical characteristics that set them apart from bacteria. They are found in extreme environments, such as hot springs and salt lakes. - Eukarya: These organisms have cells with a nucleus and other membrane-bound organelles. They include animals, plants, fungi, and protists.