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BSC 108 Final Exam (Modules 9-12) 2024
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BSC 108 Final Exam (Modules 9-12) 2024
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BSC 108 Final Exam (Modules 9-12) 2024A DNA molecule contains ______ strands of DNA. - ANSWER-2
A point mutation can change a gene's ___________ - ANSWER-protein product
a species ecological niche includes.... - ANSWER-its habitat, role in the community, and
interactions with other species
DNA has a sugar-phosphate backbone that is covalently bonded to a nitrogen-
containing base. What does this mean? - ANSWER-it is made of a sugar called
deoxyribose and a phosphate group
DNA makes RNA through... - ANSWER-transcription
eating producers instead of consumers requires less..... - ANSWER-photosynthetic
productivity and reduces the impact of the environment
how does energy flow through an ecosystem? - ANSWER-when energy flows as
organic matter through the trophic levels of an ecosystem, much of it is lost at each link
in the food chain
how have humans impacted the biodiversity on earth? - ANSWER-increase in human
population results in more people consuming resources and dumping pollutants into the
biosphere
RNA makes protein through... - ANSWER-translation
These DNA strands are __________. - ANSWER-complementary
what are analogous structures? - ANSWER-similarities among living organisms that are
due to similar environmental pressures and natural selection
What are Darwin's observations? - ANSWER--observing the geographic distribution of
species like the Galapagos finches led to his ideas about adaptation to the environment
and the origin of new species
What are detritus feeders, detritivores/decomposers? - ANSWER-organisms that
consume dead organic matter
What are examples of genetic engineering that affects agriculture and medicine? -
ANSWER-1. genetically modified crops that are herbicide resistant or produce greater
yield
, -corn has been genetically modified to resist insect infestation, attack by an insect called
the European Corn Border
-Golden Rice 2: a transgenic variety of rice that carries genes from daffodils and corn
with the goal of preventing vitamin A deficiency and resulting in blindness
2. Vaccines
3. Gene therapy
-A recombinant DNA procedure that seeks to treat disease by altering the genes of the
afflicted person by replacing or supplementing the mutant version of a gene with a
properly functioning one
what are fossils? - ANSWER-preserved remnants or impressions left by organisms that
lived in the past
What are homologous structures? - ANSWER-similarities among living organisms that
are due to a shared ancestry
what are other ways that new species form? - ANSWER-2 distinct gene pools emerge
through chromosomal changes due to.....errors in mitosis and meiosis, habitat
differentiation, sexual selection
what are potential effects of a frameshift mutation? - ANSWER-it can result in abnormal
protein products with an incorrect amino acid sequence that can be longer or shorter
than a normal protein
what are primary consumers? - ANSWER-herbivores, which eat plants, algae and
autotrophic bacteria
what are secondary consumers? - ANSWER-carnivores that are many small mammals
and small fish that consume zooplankton
what are species? - ANSWER-a group of living organisms consisting of similar
individuals capable to exchange genes or interbreeding
What are tertiary consumers? - ANSWER-ex: snakes that eat mice
what are the 2 main ideas of the The Origin of Species? - ANSWER--evolution explains
life's unity and diversity
-natural selection is a cause of adaptive evolution
What are the 3 types of RNA? - ANSWER-mRNA, tRNA, rRNA
what are the 3 types of symbiosis? - ANSWER-mutualism, commensalism, parasitism
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