In which part of the human respiratory system does actual oxygen exchange take place? 1.bronchi 2.trachea 3.diaphragm 4.alveoli

Which of these is a major trend in land plant evolution? a) the trend toward smaller size b) the trend toward a gametophyte-dominated life cycle c) the trend toward a sporophyte-dominated life cycle d) the trend toward larger gametophytes

Study this image which statement best describes the rock shown check all that apply

Why is it important to study each branch of earth science?