The answer is B... im just making a guess so...
Green plants and photosynthetic bacteria are examples of photoautotrophs. ... photoheterotrophs, which also make energy from light but cannot use carbon dioxide ... chain; they provide food for other organisms and are vital in all ecosystems. ... Some bacteria are photoautotrophs; most of these are called cyanobacteria
Answer:
In a darker background, natural selection favors the darker birds.
Same goes for a ligter background
Explanation:
There is pressure in a population to look the same, because if you are white in a flock of regular pigeons, you will be targeted by predators, mainly Peregrine Falcons. However, in a city environment, it my benefit you (the pigeon) to be a different color, as more people will feed you. However, due to the release/escape of domestic pigeons, new colors that would not have appeared in the wild population are there.
Just drop a comment if you want a more detailed explanation.
Well, since its about it needing to survive and reproduce in a specific environment, it should be fitness.
Calcium has twenty neutrons.
