The bones in a bird are hollow, reducing its weight for flight, this is an example of ADAPTATION. The adaptive responses emerge as a consequence of different environmental pressures.
<h3>Adapatation and environment</h3>
Adaptation is an evolutionary process by which organisms adjust to the environment in which they live.
For example, the bones in a bird are hollow because this adaptive feature enables them to fly.
Adaptations are a consequence of the process of natural selection, i.e., the differential survival and reproduction of the fittest organisms.
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Answer: B (Color blindness)
Explanation:
Typical red-green color blindness in human patients is caused by mutations on genes located in the X chromosome. These mutations act in a recessive manner. Since females have two X chromosomes, the presence of a mutation in a single one of them does not normally result in color blindness. Males, in contrast, have a single X chromosome and therefore the presence of a mutation is likely to cause the disease.
About the other options: Down‘s syndrome is a numerical chromosomal anomaly, not related to sex. Human blood type is a codominant trait. Finally, tail length in dogs is a polygenic trait not amenable to classic Mendelian analysis.
means, a lot of life in a particular area
Explanation:
High biodiversity means that a region supports a wide variety of species, while low biodiversity implies that an area supports only a few.
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.
