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Terms in this set (25)
The ultimate source of energy flowing into nearly all ecosystems is
In an ecosystem, energy
typically flows from producers through a series of consumers.
Organism is to community as organ is to _____.
Which sequence lists organisms in the order of producer, consumer, and decomposer?
algae, bird, earthworm
Which level in the hierarchy shown is a community?
Which level in the hierarchy shown is a population?
The tree in your backyard is home to two cardinals, a colony of ants, a wasp's nest, two squirrels, and millions of bacteria. Together, all of these organisms represent
As we respire, we release CO2. The CO2Â comes from _____.
Which of the following organisms belongs to the group represented in Box 1?
Which of the following statements about ecosystems isÂ false?
Bacteria and fungi recycle energy within an ecosystem.
Which statement about the properties of life isÂ false?
Organisms have an unchanging, constant internal environment.
Life is organized in a hierarchical fashion. Which sequence correctly lists that hierarchy from least inclusive to most inclusive? AKA simplest to the most complex?
molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem
Which of the following statements accurately describes a typical gene?
A gene is a segment of DNA that directs the synthesis of a specific protein.
Which statement about genetics isÂ true?
Differences among organisms reflect different nucleotide sequences in their DNA.
Which of the following statements is true about the chemical nutrients in an ecosystem?
They cycle within the ecosystem and are constantly reused.
Cells that posses organelles are classified as _____________
Which one of the following organisms is not an eukaryote?
A hypothesis is
a proposed explanation for a set of observations.
You notice that over the past month, many students on campus have started wearing a new style of school sweatshirt. You think to yourself that perhaps the bookstore has recently started selling this new sweatshirt style. This prediction is an example of
A theory is
an explanation of an idea that is broad in scope and supported by a large body of evidence.
Local farmers think that a commonly used pesticide is responsible for the increase in appearance of frogs with an additional appendage. To test this hypothesis, frogs are injected with a small amount of pesticide mixed in ethanol. The frogs are allowed to produce offspring to test the effect of the pesticide. Which of the following would be the best controlled experiment?
One group is injected with ethanol, one group is injected with pesticide, and one group is not injected with anything.
A scientist notices that a warning light has been triggered on a piece of equipment that he is using. The scientist believes that this means the light bulb has stopped working. This is a(n) _____.
To be scientifically valid, a hypothesis must be
The role of a control in an experiment is to
provide a basis of comparison to the experimental group.
A scientist performs a controlled experiment. This means that
two experiments are conducted, one differing from the other by only a single variable.
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