B) is the correct answer. The flu virus does not have the same genetic makeup each year as with each individual it infects its rapidly mutating.
Answer:
b
Explanation:
they have a a physical mass that is easy to absorb through the roots of a plant allowing the plant to make its own energy from said nutrients
Answer:
Thermosphere.
Explanation:
The Northern lights are located at the Thermosphere of the atmosphere. The Thermosphere is lies beyond 80 km above the mesopause. The properties of gases are not constant in this layer. temperature increase rapidly with the increase of height. There are number of ionic layers in this sphere. The layer called D disappears with the sunset as it associated with solar radiation.
In a desert, the climate is “hot” and “dry”.
