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WorksheetsBSHS Origin of Life and Classification
Total questions: 9
Worksheet time: 5mins
One of the accepted scientific theories describing the origin of life on Earth is known as chemical evolution (including the "coacervate hypothesis"). According to this theory, which of the following events would need to occur first for life to evolve?
onset of photosynthesis
origin of genetic material
Synthesis of organic molecules
formation of the plasma membrane
Which types of organisms developed first due to the early environmental conditions on Earth?
prokaryotic and aerobic
prokaryotic and anaerobic
eukaryotic and aerobic
eukaryotic and anaerobic
The Miller-Urey experiment of 1953 was designed to test the hypothesis that lightning supplied the energy needed to turn atmospheric gases into organic molecules such as amino acids. Which of the following describes why the Miller-Urey theory is widely accepted today?
Amino acids spontaneously form from molecules in the atmosphere today.
Organic molecules are present today in extremely high concentrations.
The process of synthesizing organic molecules from a mixture of gases has been successfully modeled in the
laboratory.
No other alternative hypotheses have been introduced.
This diagram shows a proposed theory of the origin of eukaryotic cells, called endosymbiosis.
Which of the following explains why cells that contained mitochondria-like organelles had an evolutionary advantage?
They were able to photosynthesize
They had more DNA
They were able to make more use of
available energy
They were immune to bacterial invasion
Organisms classified as fungi have unique characteristics. Which of the following characteristics is found only in organisms classified in the kingdom fungi?
single cells without a nucleus
multicellular with chloroplasts
multicellular filaments that absorb nutrients
colonies of single, photosynthetic cells that reproduce asexually
This diagram represents possible evolutionary pathways of certain organisms.
Which species is most closely related to species L?
species E
species F
species G
species I
Which kingdoms have photosynthetic organisms?
fungi and plants
fungi and protists
protists and plants
plants and animals
Some characteristics of a recently discovered organism are listed in the table.
Based on the given characteristics, this organism would be classified in which
kingdom?
eubacteria
fungi
plantae
protista
In 1990, Carl Woese introduced the three-domain system for classifying living things, after the advancement of DNA analysis allowed for a comparison of species' genetic codes. Which of the following is the best explanation for why domains were added to the previous system of classification?
The old system of classification was wrong and needed to be corrected.
New species are evolving too quickly to keep up with the old system of classification
Domains have always been included, they were just made official recently.
Some organisms, which were previously characterized together, were determined to be genetically very
different.
