David shows delayed intellectual development and has flattened facial features. the doctors explain that this genetic disorder is a result of extra genetic material in the 21st chromosome. which disease is david suffering from?

Which of the following statements is accurate about evolution? question 10 options: natural selection only eliminates odd individuals. evolution means that a population never has changes in its genetic frequencies. mutations are always harmful. evolution means that a population undergoes changes in its gene frequencies over time.