Answer: c
Explanation: Plants and animals need nitrogen to make proteins but they cannot take it in from the air. Because nitrogen is unreactive as a gas, it has to be transformed into a new molecule. When bacteria in the soil takes nitrogen from the air, it becomes nitrates. Finally, it can move through the food chain in this form.
Answer:
Oil can be burned to heat water, using the steam to generate power. Or, oil can be burned under pressure to produce exhaust gasses.
Answer:
<u>Repeat a behaviour.</u>
Explanation:
When we adopt a new behaviour, a neural pathway is created and it gets stronger when we repeat until it become a new normal behaviour or a habit. When a message travels in a same neuronal pathway again and again, the brain begin to transmit it even more faster and these behaviours become automatic.
The process by which living things produce more organisms like themselves is the reproduction. There are two types of reproduction namely; asexual reproduction where only one parent is involved, and sexual reproduction that needs two parents, such that the cells of the two parents (egg and sperm) join, resulting to a unique offspring since they have characteristics from each parent are passed down/combined.
D. Bacteria because “bacteria” is actually a domain itself
