Answer:
For early earth, it was filled with loads of oxygen and could kill humans if they breathed the oxygen that was in the air about 100 million years ago. This massive amount of oxygen cause massive creatures like the dinosaurs to exist. Current earth has an atmosphere with not too much oxygen.
Explanation:
brainliest
Answer:
Most biomolecules are organic compounds, and just four elements—oxygen, carbon, hydrogen, and nitrogen—make up 96% of the human body's mass. But many other elements, such as the various biometals, are present in small amounts. Sometimes polymers are also known as macromolecules or large-sized molecules. Usually, polymers are organic (but not necessarily). A monomer is a molecule that is able to bond in long chains.
Explanation:
Understand?
Answer:
The correct answer is innate behavior.
Explanation:
The behavior that gets monitored by genes and goes through the process of natural selection is termed as an innate behavior. This form of behavior takes place naturally and it just requires a specific kind of stimulus in order to get initiate. Instinctive behavior is the other term for innate behavior.
The tendency of an animal to perform a specific behavior after getting exposed to the stimulus for the first time is known as instinct. It can be said that one cannot learn innate or instinct behavior. It is performed by all the species in a similar manner irrespective of the surroundings. Caring for offspring is one of the examples of innate behaviors performed by the species that even demonstrate the basic life functions. Innate behaviors play an essential role in transmitting or passing genes to the coming generations.
They construct dams and create an ecosystem for other species . Because of their dam building nests become available for birds, fish population increases and waterfowl population goes up
