Several atmospheric gases contribute to global warming: carbon dioxide, methane, and nitrous oxide. That is the conversion of restaurant grease to bio-diesel fuel for use by motorists.
Answer:
he relationship between environment, variation and selection lay the foundation for natural selection and evolution.
Genetic variations are present among species due to number of reasons like recombination or crossing over during meiosis, mutations, random fertilization etc. These factors bring changes among the members of a species. Some of the species become better adapted to survive in a particular environment whereas some are not better adapted and become extinct over a period of time. The environment selects the organisms that are best adapted to survive and hence lead to variations.
Explanation:
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Answer:
Auxins
Explanation:
Phototropism is a growth response caused by unilateral light. When a plant shoot is subjected to light from one side, it forms a growth curvature towards the source of light. Shoots exhibit positive phototropism. Unidirectional light causes lateral migration of auxins from the lit side to the dark side. Higher concentration of auxins on the dark side stimulates rapid cell elongation in the stem. Hence the dark side elongates faster than the lit side resulting in a growth curvature towards the source of light.
The relationship in human hair alleles is that of incomplete dominance whereby allele of a specific trait is not fully expressed over it paired allele. By crossing any two wavy haired humans all the air type which is obtained is hairy. Crossing straight haired and wavy-haired man will produce one curly is to one straight is to one wavy. She is faithful.