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Exam 1: The Scientific Study of Life

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Question 31

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You perform an experiment in which you take 16 pots of strawberry plants and give half of them 1 gram of ammonium nitrate per liter of water and the other half just get water. Each group is then split in half again, and exposed to either 8 or 16 hours of light each day. You monitor the height of the plants for four weeks. You observe that increasing ammonium nitrate and light both increase plant height. -A plant takes up nutrients like ammonium nitrate to maintain

A) natural selection.
B) asexual reproduction.
C) homeostasis.
D) evolution.
E) sexual reproduction.

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Question 32

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The cell is the basic unit of life.

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Question 33

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Given basic information from observations of the orchid with a long nectary,and the moth with the long proboscis,what is the advantage to a plant like an orchid producing nectar over a plant like a pine tree that does not produce nectar?

Organisms require energy to stay organized.What is the energy source for the plants in your experiment?

This figure shows graphed medical research results from a study on a new vaccine. The research was done in an effort to determine if a new vaccine would be effective at preventing potentially dangerous rotavirus infections in infants. Green data bars represent occurrence of infant cases that had normal rotavirus strains that aren't critically dangerous. Blue data bars represent occurrence of infant cases that had more dangerous rotavirus strains that can hospitalize or lead to fatality of infants -In the graph,the X-axis is showing different doses of vaccine,including "placebo," "low," "medium" and "high." These levels of vaccine were applied to different groups of babies to test if and how much the vaccination helped reduce the incidence of rotavirus,an illness that can quickly dehydrate infants to critical or fatal levels.These doses represent

To be considered 'life,' an organism must minimally consist of

You perform an experiment in which you take 16 pots of strawberry plants and give half of them 1 gram of ammonium nitrate per liter of water and the other half just get water. Each group is then split in half again, and exposed to either 8 or 16 hours of light each day. You monitor the height of the plants for four weeks. You observe that increasing ammonium nitrate and light both increase plant height. -Which of the following is a (are) dependent variable(s) in this experiment?

The four kingdoms included in the domain Eukarya are

You perform an experiment in which you take 16 pots of strawberry plants and give half of them 1 gram of ammonium nitrate per liter of water and the other half just get water. Each group is then split in half again, and exposed to either 8 or 16 hours of light each day. You monitor the height of the plants for four weeks. You observe that increasing ammonium nitrate and light both increase plant height. -Which of the following is an (are) independent variable(s) in this experiment?

'Life' is defined for any particle,substance or object as anything which is not dead.

Which of the following is not a true statement about the scientific method?

Health care and fitness professionals promote moderate exercise for each person,throughout the week.Positive results are reportedly better heart health.In an attempt to study effect of moderate research on heart health,you track four groups of fellow students through a semester.One group is a control and told not to change any of their exercise patterns.The three other groups are assigned to a 30-minute exercise once,twice or three times a week.Results at the end of the semester show that average blood pressure and pulse rates are nearly the same for the control group and the once-a-week exercisers.Average blood pressure and pulse were slightly lower for the two groups that exercised more often,but not every student showed any difference,and some actually had increases,as found in all four groups.Interpret which conclusion would most likely be made,once the described results are analyzed with statistics.

In any living organism,emergent properties must

Examine this diagram.Note the structure of branches connecting groups of organisms.Called a phylogenetic tree,the branches propose relationships among organisms to each other,related to common ancestors.Although the proposed relationships can be described in sentences,the diagram summarizes them visually.The phylogenetic tree,then,represents

This figure shows graphed medical research results from a study on a new vaccine. The research was done in an effort to determine if a new vaccine would be effective at preventing potentially dangerous rotavirus infections in infants. Green data bars represent occurrence of infant cases that had normal rotavirus strains that aren't critically dangerous. Blue data bars represent occurrence of infant cases that had more dangerous rotavirus strains that can hospitalize or lead to fatality of infants -In this diagram,the Y-axis of the graph shows values of "Incidence of Illness" in infants.The varying numbers of infants getting sick with rotavirus represents the

A theory is an advanced hypothesis that has been proven to be true.

You perform an experiment in which you take 16 pots of strawberry plants and give half of them 1 gram of ammonium nitrate per liter of water and the other half just get water. Each group is then split in half again, and exposed to either 8 or 16 hours of light each day. You monitor the height of the plants for four weeks. You observe that increasing ammonium nitrate and light both increase plant height. -In this experiment,you are working with available planter pots from the laboratory.You have choices of clay pots of different sizes,as well as biodegradable peat pots and others within lab equipment provided.To establish a standardized variable,you would

Until the late 1970s,there was no "Domain" of scientific naming as the broadest category in taxonomy.Kingdom Monera included similar microscopic organisms of Eubacteria and Archebacteria.Other kingdoms,Protista,Plantae,Fungi and Animalia were also named.Researchers proposed the Domain to account for distinction beyond existing differences discovered between the bacteria-like organisms.Which type of information led most directly to the support and adoption of the broader category of Domain,and subsequent Domains of Bacteria,Archaea and Eukarya?

What is the advantage to the sphinx moth Xanthopan morgani by having an 8-inch long tongue?

A major difference between prokaryotes and eukaryotes is that prokaryotes