Which of the following is needed for photosynthesis to occur? sugar in the plant, which transforms into light energy
A
B
minerals in the soil, which transform into chemical energy
C
oxygen in the air, which transforms into electrical energy
D
energy from the Sun, which transforms into chemical energy

Which property is used to identify the origin of an igneous rock? color density hardness crystal size

Match the type of adaptation to the correct example, structural adaptation functional adaptation behavioral adaptation example type of adaptation elephants live in herds to protect their young leaves of a rain forest plant species have a pointed tip that enables rainwater to drain off easily. camels have nostrils that they can close snakes produce venom to kill prey and defend themselves. earthworms coil when touched, as part of a defense mechanism. human skin darkens with increased exposure to sunlight.

The influenza virus cause the flu, but not other diseases. why?