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Exam 1: A View of Life

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Question 21

True/False

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Living and nonliving entities share some characteristics. Which statements are TRUE and which are FALSE about the living and nonliving components of an ecosystem? -All living things and nonliving materials exhibit homeostatic controls.

A) True
B) False

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Question 22

True/False

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Living organisms on Earth share many common characteristics. Which statements are TRUE and which are FALSE about nearly all living things? -Living things must have an outside source of nutrients and energy.

A) True
B) False

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Question 23

Multiple Choice

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Choose the correct order of classification from most inclusive to most exclusive.

The independent (experimental) variable is

Living organisms are characterized by

A university biology department wishes to hire a scientist to work on the relationships among the wolves,moose,trees,and physical features on an island.If you were charged with writing the job description,you should title the position

Arrange in order,the levels of ecological study from most inclusive to most exclusive:

What type of information does science provide for society?

Dr. James isolated Staphylococcus aureus, a type of bacteria, from the leg wound of a ten-year-old boy. He suspected these bacteria would grow better at body temperature than room temperature (72°F) , but thought that he should collect data to support his thinking. Dr. James introduced the same number of Staphylococcus bacteria into each of six test tubes containing the same type and amount of nutrient broth. Three test tubes were incubated at 98.6°F (Group 1) , while three test tubes (Group 2) sat at 72°F. After 24 hours, Dr. James compared the turbidity (indicative of growth) of all six tubes and rated each on a scale of 0 - 4. 0 indicates no turbidity (no growth) , while 4 indicates high turbidity (high growth) . The following data were collected: $\begin{array} { | c | c | c | } \hline \text { Test Tube } & \text { Temperature } ^ { \circ } \mathrm { F } & \text { Turbidity } \\\hline \text { Group 1: } & & \\\hline 1 & 98.6 & + 4 \\\hline 2 & 98.6 & + 4 \\\hline 3 & 98.6 & + 3 \\\hline \text { Group 2: } & & \\\hline 4 & 72 & 0 \\\hline 5 & 72 & + 1 \\\hline 6 & 72 & 0 \\\hline\end{array}$ -The dependent (responding) variable in this experiment is

A cell is to a tissue as an atom is to a

Living organisms on Earth share many common characteristics. Which statements are TRUE and which are FALSE about nearly all living things? -Only multicellular organisms need to maintain homeostasis.

Single-celled prokaryotes

What is the best description of technology?

Biodiversity in a particular ecosystem

Living organisms on Earth share many common characteristics. Which statements are TRUE and which are FALSE about nearly all living things? -All living organisms are made up of cells.

The manner in which a scientist intends to conduct an experiment is called

The control group in an experiment receives all the same treatments as the experimental group(s),except for the one variable being tested.

Which listing correctly indicates a sequence of increasing biological organization?

Dr. James isolated Staphylococcus aureus, a type of bacteria, from the leg wound of a ten-year-old boy. He suspected these bacteria would grow better at body temperature than room temperature (72°F) , but thought that he should collect data to support his thinking. Dr. James introduced the same number of Staphylococcus bacteria into each of six test tubes containing the same type and amount of nutrient broth. Three test tubes were incubated at 98.6°F (Group 1) , while three test tubes (Group 2) sat at 72°F. After 24 hours, Dr. James compared the turbidity (indicative of growth) of all six tubes and rated each on a scale of 0 - 4. 0 indicates no turbidity (no growth) , while 4 indicates high turbidity (high growth) . The following data were collected: $\begin{array} { | c | c | c | } \hline \text { Test Tube } & \text { Temperature } ^ { \circ } \mathrm { F } & \text { Turbidity } \\\hline \text { Group 1: } & & \\\hline 1 & 98.6 & + 4 \\\hline 2 & 98.6 & + 4 \\\hline 3 & 98.6 & + 3 \\\hline \text { Group 2: } & & \\\hline 4 & 72 & 0 \\\hline 5 & 72 & + 1 \\\hline 6 & 72 & 0 \\\hline\end{array}$ -Some biologists study the complex interactions of animals and plants in forests or prairies.Such ecology field research often produces slightly different results for different researchers.In contrast,ecology experiments that are run indoors with one organism in a terrarium usually produce results that are repeatable.What is the most likely explanation?

Would you consider this to be a controlled experiment?