What do we call 2or more substances bonded together that have properties different from the elements that make them up

What does it mean for a cell membrane to be selectively permable

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

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.