Domanda del libro di testo
Explain why researchers formulate a null hypothesis in addition to a hypothesis when designing an experimental study.
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Ch. 1 - Biology: The Study of Life
Freeman8th EditionBiological ScienceISBN: 9780138276263
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TOC.tableOfContents
- Ch. 1 - Biology: The Study of Life13
- Ch. 2 - Water and Carbon: The Chemical Basis of Life14
- Ch.3 - Protein Structure and Function10
- Ch.4 - Nucleic Acids and the RNA World10
- Ch. 5 - An Introduction to Carbohydrates10
- Ch. 6 - Lipids, Membranes, and the First Cells11
- Ch. 7 - Inside the Cell10
- Ch. 8 - Energy and Enzymes: An Introduction to Metabolism10
- Ch. 9 - Cellular Respiration and Fermentation11
- Ch. 10 - Photosynthesis12
- Ch. 11 - Cell-Cell Interactions12
- Ch. 12 - The Cell Cycle8
- Ch. 13 - Meiosis12
- Ch. 14 - Mendel and the Gene23
- Ch. 15 - DNA and the Gene: Synthesis and Repair15
- Ch. 16 - How Genes Work16
- Ch. 17 - Transcription, RNA Processing, and Translation16
- Ch. 18 - Control of Gene Expression in Bacteria16
- Ch. 19 - Control of Gene Expression in Eukaryotes12
- Ch. 20 - The Molecular Revolution: Biotechnology, Genomics, and New Frontiers15
- Ch. 21 - Genes, Development, and Evolution12
- Ch. 22 - Evolution by Natural Selection16
- Ch. 23 - Evolutionary Processes13
- Ch. 24 - Speciation15
- Ch. 25 - Phylogenies and the History of Life13
- Ch. 26 - Bacteria and Archaea15
- Ch. 27 - Diversification of Eukaryotes16
- Ch. 28 - Green Algae and Land Plants16
- Ch. 29 - Fungi18
- Ch. 30 - An Introduction to Animals9
- Ch. 31 - Protostome Animals15
- Ch. 32 - Deuterostome Animals17
- Ch. 33 - Viruses16
- Ch. 34 - Plant Form and Function16
- Ch. 35 - Water and Sugar Transport in Plants16
- Ch. 36 - Plant Nutrition13
- Ch. 37 - Plant Sensory Systems, Signals, and Responses16
- Ch. 38 - Flowering Plant Reproduction and Development16
- Ch. 39 - Animal Form and Function17
- Ch. 40 - Water and Electrolyte Balance in Animals16
- Ch. 41 - Animal Nutrition16
- Ch. 42 - Gas Exchange and Circulation16
- Ch. 43 - Animal Nervous Systems16
- Ch. 44 - Animal Sensory Systems16
- Ch. 45 - Animal Movement11
- Ch. 46 - Chemical Signals in Animals16
- Ch. 47 - Animal Reproduction and Development16
- Ch. 48 - The Immune System in Animals16
- Ch. 49 - An Introduction to Ecology15
- Ch. 50 - Behavioral Ecology16
- Ch. 51 - Population Ecology16
- Ch. 52 - Community Ecology20
- Ch. 53 - Ecosystems and Global Ecology17
- Ch. 54 - Biodiversity and Conservation Ecology18
Freeman8th EditionBiological ScienceISBN: 9780138276263Non è quello che usi tu?Cambia libro di testo
Capitolo 1, Problema 7
What is 'selected' during natural selection? Explain your answer.
Guida verificata passo dopo passo1
Step 1: Understand the concept of natural selection. Natural selection is a key mechanism of evolution, the process by which biological traits become either more or less common in a population as a function of the effect of inherited traits on the differential reproductive success of organisms interacting with their environment.
Step 2: Identify what is 'selected' during natural selection. In the context of natural selection, what is 'selected' are the traits or characteristics of organisms that enable them to survive and reproduce more effectively in their environment.
Step 3: Explain how traits are 'selected'. Traits that provide an advantage in survival and reproduction are 'selected' in the sense that they become more common in the population over generations. This is because organisms with these traits are more likely to survive to reproductive age and pass on these traits to their offspring.
Step 4: Provide an example. For instance, if a certain type of bird with a long beak can reach food more easily than a bird with a short beak, the long-beaked bird is more likely to survive and reproduce. Over time, the trait of having a long beak becomes more common in the bird population, as it is 'selected' by the process of natural selection.
Step 5: Summarize the concept. In conclusion, what is 'selected' during natural selection are the advantageous traits that increase an organism's chances of survival and reproduction. Over time, these traits become more common in the population.
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Natural Selection
Natural selection is a fundamental mechanism of evolution, proposed by Charles Darwin. It describes the process by which individuals with advantageous traits are more likely to survive and reproduce in a given environment. Over time, these traits become more common in the population, leading to evolutionary changes.
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Percorso guidato
04:43
Natural Selection
Variation
Variation refers to the differences in traits among individuals within a population. These variations can be due to genetic differences, environmental factors, or mutations. In the context of natural selection, variation is crucial because it provides the raw material for selection; without it, there would be no traits for selection to act upon.
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Percorso guidato
02:16Sources of Genetic Variation
Fitness
Fitness in evolutionary biology refers to an organism's ability to survive and reproduce in its environment. It is often measured by the number of offspring an individual produces that survive to reproductive age. Traits that enhance fitness are 'selected' during natural selection, as they increase the likelihood of passing those traits to the next generation.
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02:57Adaptation Improves Fitness
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