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Exam 1: A View of Life

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Question 1

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The ultimate source of energy for nearly all forms of life on Earth is water.

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Question 2

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The classification system most commonly used by biologists today contains five domains.

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Dr.James considers the bacteria grown at body temperature to be the control group and room temperature the experimental group.Do you agree with this reasoning?

An earlier classification system grouped organisms by whether they inhabited the air,land,or sea.More modern classification systems such as the three-domain system are divided into class-order-family-genus-species as described in this chapter.What advantages does the more modern classification system have over the older system?

Which of the following organisms are ultimately dependent on the sun as a source of energy?

Living organisms on Earth share many common characteristics. Which statements are TRUE and which are FALSE about nearly all living things? -In multicellular organisms,tissues are comprised of many different types of cells.

Living and nonliving entities share some characteristics. Which statements are TRUE and which are FALSE about the living and nonliving components of an ecosystem? -Both living and nonliving entities adapt to the environment.

Which of the following concepts is NOT one of the basic theories of biology?

A researcher is interested in determining the average length and weight of loblolly pine tree needles in the southeast United States.Will the data be obtained through observation or experimentation?

For five years,you wake up before the alarm is set to ring each morning.This leads you to conclude that all people have a built-in "alarm clock" capable of waking them up.From a science viewpoint,this conclusion

A doctor is testing the effectiveness of a new antibiotic.He gives the first group of patients a placebo,a second group receives antibiotic A,while the third group receives antibiotic B.Which of the groups is considered the control group?

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 matter,whether alive or not,is comprised of atoms.

Organisms belonging to the same ________ would be the most closely related.

All of the following are examples of maintaining homeostasis except:

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 are made of cells.

The expected outcome of an experiment is known as

The selective agents for natural selection can be either abiotic or biotic.

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: $\begin{array} { | c | c | c | } \hline \text { Test Tube } & \text { Temperature } ^ { \circ } \mathrm { F } & \text { Turbidity } \\\hline \text { Group 1: } & & \\\hline 1 & 98.6 & + 4 \\\hline 2 & 98.6 & + 4 \\\hline 3 & 98.6 & + 3 \\\hline \text { Group 2: } & & \\\hline 4 & 72 & 0 \\\hline 5 & 72 & + 1 \\\hline 6 & 72 & 0 \\\hline\end{array}$ -Evaluate the data presented here to reach a conclusion.Would you reject or accept the null hypothesis?

Some members of Daphnia,a water flea,have a genetic mutation that causes them to prefer warmer environments.These members reproduce and pass these genetic changes to their offspring.The next generation will occupy warmer environments not previously occupied by this species.This is an example of

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: $\begin{array} { | c | c | c | } \hline \text { Test Tube } & \text { Temperature } ^ { \circ } \mathrm { F } & \text { Turbidity } \\\hline \text { Group 1: } & & \\\hline 1 & 98.6 & + 4 \\\hline 2 & 98.6 & + 4 \\\hline 3 & 98.6 & + 3 \\\hline \text { Group 2: } & & \\\hline 4 & 72 & 0 \\\hline 5 & 72 & + 1 \\\hline 6 & 72 & 0 \\\hline\end{array}$ -After reading the scenario,write the hypothesis that was being tested in Dr.James's experiment.