Answer
They have polygenic inheritance and are also affected by the environment factor.
Explanation
The trait of height and skin tone are controlled by different genes and are also affected by environmental factors. The skin tone and height within the population is not specific, both have wide ranges varies from high expression of the gene to less or even no expression of the gene. Mostly these factors are mostly affected by inheritance and less by environmental factors.
Answer:
The answer is autotrophs
Explanation:
During the early days of the Earths life there was no oxygen but there was plenty of CO2 which the autotrophs took and used as food while discarding the excess which was the oxygen.
Answer:
hope it helps
Explanation:
The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
Answer:
Explanation:
Carbon dioxide is added to the atmosphere naturally when organisms respire or decompose (decay), carbonate rocks are weathered, forest fires occur, and volcanoes erupt. Carbon dioxide is also added to the atmosphere through human activities, such as the burning of fossil fuels and forests and the production of cement
