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A fundamental characteristic of life on Earth is that __________
living things grow and reproduce
Homeostasis is the process by which __________.
living things maintain their complex structure and the internal conditions needed to sustain life
Which of the following groups of organisms contains prokaryotic cells? Please select the most appropriate answer.
Bacteria and Archaea
Organisms that can extract energy from light are
called __________; organisms that must obtain energy from molecules made
by other organisms are called __________.
Science assumes that natural laws (such as the law of gravity) __________.
apply uniformly through space and through time
The process of evolution involves __________.
natural selection of organisms that produce more offspring in certain environmental conditions, changes in a species due to mutations, adaptation of an organism to its environment
You discover a new type of organism in the back of
your fridge. Luckily, your roommate is a biology major and takes you to the lab where he works. You put a small piece of the fuzzy critter under the microscope and see that it is made of very simple, single cells with no nucleus. What type of organism might this be?
A scientist is testing whether a new cancer drug will
work on prostate cancer in humans. To properly interpret results of an experiment, control experiments are needed. Which of the following treatments would serve as a control in these experiments, so that the researchers can conclude that the changes that they see in the patients are due to the drug?
Both the second and fourth answers are correct.
Your textbook lists seven characteristics that living
organisms possess as a group. However, if you could distill these seven characteristics down to two general descriptive properties held in common by all living organisms, what would they be?
macromolecular complexity and multiple levels of organization
The organic complexity and organization characteristic of living organisms depends on the periodic capture of raw materials and energy. Ultimately, the source of these materials and energy is __________.
Energy, like gasoline for your car, is required for organisms to survive, and even thrive, in the face of diverse environments. An autotrophic organism __________.
- would be one who derived its energy from a renewable external energy source such as sunlight (i.e., photosynthetic organisms)
- would include cucumbers growing in your garden
Another way to describe the "scientific method" would be that it is __________.
- dependent upon "getting the word out" to other scientists via peer-reviewed publications, including electronic journals,
- a conceptual and ethical framework that guides scientific inquiry,
- dependent upon observations leading to a hypothesis and careful experimental design and scrutiny of experimental results (data), leading to a conclusion that refutes or supports the hypothesis
Experiments are carefully designed in an attempt to __________.
test a single experimental variable
Natural selection is best measured by __________.
A basic understanding of basic biological concepts __________.
permits a deeper, and sometimes profound, appreciation of the world around us
Which of the following terms includes all of the others?
The diversity of life is mainly due to __________.
You are a NASA scientist and have discovered an
organism in outer space that contains its genetic material in the
cytoplasm rather than in a nucleus. Given this characteristic, how might you classify this organism?
Your baby starts crying. Since she hasn't eaten in two hours, you declare, "The baby must be hungry." Your statement is
Natural selection would be best illustrated by which of the following?
a bacterial cell in the human body with a genetic variation that allows it to survive when the person take antibiotics
The units of heredity that provide information needed to control life are the __________.
A process called __________ allows organisms to keep conditions in their bodies fairly constant.
The most important force in evolution is __________.
In a scientific experiment, one must have a __________ in which all factors remain constant.
Structures, physiological processes, or behaviors that aid survival and reproduction in a particular environment are __________.
A __________ is a supposition of prediction, based on
previous observations, that is given as a possible explanation for an observed phenomenon.
- A cell
- B organelle
- C molecule
- D atom
- A organelles
- B cell wall
- C nucleus
- D nuclear membrane
- E cell membrane
- A oral groove
- B contractile vacuole
- C food vacuoles
A scientist examines an organism and finds that it is eukaryotic,
heterotrophic, and multicellular and that it absorbs nutrients. he concludes that the organism is a member of the kingdom
Which statement is correct?
Mutations are accidental changes in genes.
Genes are proteins that produce DNA.
Heterotroph means "self-feeder."
A scientific theory is similar to an educated guess.
Eukaryotic cells are simpler than prokaryotic cells.
Mutations are accidental changes in genes.
Choose the answer that best describes the scientific method.
observation, hypothesis, experiment, conclusion
Which of the following are characteristics of living things?
- They reproduce.
- They respond to stimuli.
- They are complex and organized.
- They acquire energy.
The three natural processes that form the basis for evolution
genetic variation, inheritance, and natural selection