An experiment is conducted in which pea seeds are planted 10 mm apart in tray I and 1 cm apart in tray II. Both trays are exposed to the same environmental conditions. It is noted that plants grown in tray I are very weak while plants in tray II are healthy.
AThe plants compete for limited available resources
BThe plants are not exposed to sufficient sunlight
CThe plants are grown in nutrient deficient soil
DThe plants suffered a pathogen attack
but 10 mm is equal to 1 cm !!
Refer to the given diagram and select correct examples of X, Y and Z resources of energy.
X Y Z
A Petroleum Coal Hydro energy
B Solar energy Natural gas Coal
C Tidal energy Petroleum Nuclear energy
D Coal Nuclear energy Petroleum
not understanding please clarify