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A hypothesis is ______.
a tentative explanation of a natural event
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Which statement is false about science?
The conclusion of an experiment can never change.
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A ______ is a conceptual scheme that join together well‐supported and related hyptheses.
theory principle
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When most investigators do controlled studies, what do you call the group that does not receivetreatment
control
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What is usually the last step in the scientific method?
draw a conclusion on the basis of the experiment
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Which of the following has the greatest amount of evidence for being "true"?
law
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A theory that is accepted by many scientists sometimes is called a ______.
law
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The ______ theory enables scientists to understand the history of life, the variety of livingthings, and the development of organisms.
evolution
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Which theory states that organisms contain coded information that dictates their form,function, and behavior?
Gene Theory
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Which theory states that all organisms are composed of cells
Cell Theory
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Which theory states that all living things have a common ancestor and are adapted to aparticular way of life
Evolution Theory
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Which theory states that life comes only from life?
Biogenesis Theory
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Which of the following statements is NOT true about science?
The results of an experiment do not need to be statistically analyzed.
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The general approach scientists employ to gather information is known as the _____.
scientific method
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In which way has science NOT improved our lives?
increased ethical and moral values
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The circulatory system is composed of the heart and the blood vessels, which in turn arecomposed of cells. This is an example of which characteristic of life
Living things are organized.
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The next higher level of biological organization above the cell is the ______.
tissue
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The highest level of biological organization listed here is the ______.
- atom
- cell
- tissues
- organ
- Correct answer: organism
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Which sequence correctly increases complexity in the level of biological organization?
atoms, molecules, cells, tissues, organs
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A(n) ______ is the lowest level of biological organization to have the characteristics of life.
cell
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The stomach in our body represents which level of biological organization?
organ
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Organs, such as the heart, are composed of ______ which is the next lower level of biologicalorganization
tissue
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Which of the following is NOT a characteristic of life?
Living things are unorganized
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Which of the following is NOT a characteristic of life?
Living things have an internal environment that stays absolutely constant.
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The body temperature of humans fluctuates only slightly during the day. This is an example ofwhich characteristic of life?
Living things are homeostatic
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Plants can capture solar energy and carry on ______, a process that allows them to make theirown food
photosynthesis
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Food provides nutrient molecules, which are used either as building blocks or for ______.
energy
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All systems of the body contribute to homeostasis. The ______ system provides nutrient molecules
digestive
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All systems of the body contribute to homeostasis. The ______ system transports the nutrient molecules about the body
circulator
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All systems of the body contribute to homeostasis. The ______ system rids the blood of metabolic wastes
excretory
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All systems of the body contribute to homeostasis. The ______ systems coordinate the activitiesof the other systems.
nervous and hormonal
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Living things respond to external stimuli. Which of the following is NOT a response to astimulus
Organs are composed of tissues, and each tissue contains groups of similar cells.
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______ is the capacity to do work
Energy
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When a sharp pin gets stuck in your finger, your arm moves quickly away. This is an example of which characteristic of life?
Living things respond to stimuli.
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Living things cannot maintain their organization or carry on life's activities without an ______.
outside source of materials and energy.
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The ability of living things to produce offspring that resemble themselves is called ______.
reproduction
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All the chemical reactions that occur in a cell are called ______.
metabolism
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A bird like an osprey can catch a fish. The osprey has massive flight muscles, a white breast andbelly to camouflage its presence, and strong feet and claws to hold onto the slippery fish. This is an example of which characteristic of life?
Living things are adapted to a particular way of life.
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Which of the following statements is NOT correct about evolution?
New variations within certain members of a species allow them to capture fewerresources
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An acorn seed becomes a seedling before it is an oak tree. This is an example of which characteristic of life?
Living things grow and develop
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A housefly has offspring that soon replace the parents. This is an example of which characteristicof life?
Living things reproduce
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Modifications that make an organism better suited to its way of life are called ______.
adaptations
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______ is the process by which characteristics of species change through time.
Evolution
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All the members of one species belong to a(an) ______.
population
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The ______ is any place on the surface of the earth, whether in the atmosphere or down intothe seas, where organisms exist.
biosphere
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The ______ represents all of the populations of organisms in one natural setting plus theirphysical environment.
ecosystem
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Which of the following statements is FALSE?
Correct answer: As ecosystems are destroyed, the number of species living there will increase.
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A(an) ______ is a biologist dedicated to naming, describing, and classifying organisms.
systematis
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What is the correct scientific name for humans?
Homo sapien
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Humans belong to the kingdom ______.
Animalia
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According to the classification system, humans belong in the phylum ______.
Chordata
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According to the classification system, humans belong in the class ______.
Mammalia
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According to the classification system, humans belong in the family ______.
Hominidae
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Protozoans, algae, and water molds belong to the kingdom ______.
Protista
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Molds and mushrooms belong to the kingdom ______.
Fungi
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Mosses and ferns belong to the kingdom ______.
Plantae
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Which of the following systematic sequences is correct starting from the most specific butincluding the fewest in number?
species, genus, family, order, class
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Which of the following statements is FALSE?
Organisms placed in the same genus are least closely related.
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Populations interact with each other by forming _____ in which one population feeds on another.
food chain
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Which of the following is not considered one of the three domains?
Protista
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