Chemotherapy and radiation are treatments for what non-communicable disease

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

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?