Describe how genes, chromosomes, proteins, mutations, and mutagens are related to each other. plz help me

Which of the following is not a way in which a vascular plant's xylem and phloem are similar?

What enzyme is most important for dna replication and why?

Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.