Biology, 17.10.2019 22:50 stargirl21359
If a killer whale is feeding at the fourth trophic level, how much phytoplankton mass is required to add each gram of new mass to the whale? assume that 10% of the energy at one trophic level is transferred to the next level.
a. 1000 grams b. 100 grams c. 500 grams d. 1 gram
Answers: 2
Biology, 21.06.2019 20:00
Read the following scenario to answer the following question. 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. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution
Answers: 2
Biology, 22.06.2019 05:30
What is a sex-linked genetic disorder that disrupts the blood's ability to clot? a.achondroplasia b.huntington's disease c.hemophilia d.albinism
Answers: 2
Biology, 22.06.2019 06:30
Approximately what portion of the foods that we eat have been genetically modified in some way? a.fewer than 10% b.about 50% c.nearly 100%
Answers: 1
If a killer whale is feeding at the fourth trophic level, how much phytoplankton mass is required to...
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