gen B có A = T =200Nu và G = X = 300Nu. gen bị đột biến thành gen b làm giảm 1 liên kết H. tín số nu mỗi loại trong gen b ?

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

Aresident is five feet tall.what is the measurements in iches

Identify the area on the image where the force of attraction is the strongest.