The graph below shows the English sparrow population in an area over several years. In 1988, a large shopping mall was built in the area where the sparrows lived.

According to the information in the graph, how did this affect the sparrow population over a period
of time?
a. The population increased because humans fed the sparrows.
b. The sparrow population was unaffected by the shopping mall.
c. The population increased because predators were removed.
d. The sparrow population decreased because of habitat destruction.

Over the past 60 years, many amphibian species have experienced significant population declines and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. chytridiomycosis is a fungal disease first identified in 1998 as a cause of massive amphibian deaths. in some severely impacted populations, a few individuals have survived, perhaps because of some natural resistance. if these resistant individuals continue to survive and prosper, new resistant populations might emerge. this would be an example of the founder effect artificial selection genetic drift natural selection sexual selection

What do we call an individual that has inherited two identical alleles for the same trait? a.homozygous b.heterozygous c.monozzygous

How do bacteria protect their genetic material and cytoplasm during harsh conditions