CHAPTER 1 TEST REVIEW

Know the definition of homeostasis.

Research 2 ways which animals can maintain homeostasis.

Know the difference between a quantitative observation and a

qualitative explanation.

Some scientists conducted an experiment in which they evaluated various measurements of human health in people who drank at least one cup of coffee a day. They found no significant differences in these health indicators between the subjects who drank only one cup of coffee a day and those who drank as many as 20 cups a day. They concluded that coffee has no adverse effects on human health. Write your answers to the following in the spaces below.

a. What were the independent and dependent variables in this experiment?

b. Was this a controlled experiment? If so, what were the control and experimental groups?

c. Do you agree with the conclusion the scientists drew from their results? Why or why not?

Independent = # of cups of coffee Dependent = human health This was not a controlled experiment

because there was no groups who received 0 cups of coffee.

Your conclusion is your own opinion. Make sure you provide evidence either way.

Write a good Scientific question that this experiment tried to answer (manipulated

and responding variable). Some scientists conducted an experiment

in which they evaluated various measurements of human health in people who drank at least one cup of coffee a day. They found no significant differences in these health indicators between the subjects who drank only one cup of coffee a day and those who drank as many as 20 cups a day. They concluded that coffee has no adverse effects on human health. Write your answers to the following in the spaces below.

Design an Experiment.

Be able to design an experiment. Include

Question Prediction Investigation Evaluation Communication

Briefly discuss 2 of the major themes in biology that we will examine this year. Write your answer in the space below. 2 points Ecology = the study of organisms and their

environment Evolution = how organisms adapt to survive

Name five characteristics that are considered distinct properties of all living things. Write your answer in the space below. Cellular organization Metabolism Ability to reproduce Ability to respond to stimuli Homeostasis Ability to grow and develop

Toads that live in hot, dry regions bury themselves in the soil during the day. List and describe the type of behavior the toad exhibits to survive. 2 points Toads must maintain a constant internal

environment (homeostasis) in order to function properly. Burying themselves in the soil is an adaptation that keeps their body temperature from rising too high and keeps their bodies from drying out.

List two things why is it important to study biology even if you are not planning a career in biology. 2 points By studying biology, you can make informed

decisions that impact both you and the society in which you live. Decisions about your health, your food supply, and your environment are only some of these issues.

Scanning, transmission

A ____________________ electron microscope passes a beam of electrons over a specimen’s surface, whereas a ____________________ electron microscope passes a beam of electrons through a thin slice of a specimen.

controlled

A ____________________ experiment is one in which the condition suspected to cause the effect is compared to the same situation without the suspected condition.

theory

A unifying explanation for a broad range of observations is a ____________________.

a. working alone in the lab

Which of the following is not an example of good laboratory practice?

a. working alone in the lab b. asking permission before using

equipment c. working with a partner in the lab d. wearing goggles in the lab

homeostasis

To function properly, all living things must maintain a constant internal environment through the process of ____________________.

results

What do you analyze after you complete your experiment ____________________?

d. Both a and b

Scientists share their research results by a. publishing in scientific journals. b. presenting at scientific meetings. c. avoiding conflicts of interest. d. Both a and b

a. A—area

Which of the following is not a correct association between an SI base unit abbreviation and its base quantity?

a. A—area b. m—length c. s—time d. mol—amount of a substance

c. 500.

A light microscope that has an objective lens of 100x and an ocular lens of 5x has a magnification of

a. 30. c. 500. b. 200. d. 2000.

b. theory.

A unifying explanation for a broad range of observations is a

a. hypothesis. c. prediction. b. theory. d. controlled experimen

b. life

Biology is the study of a. minerals. c. the weather. b. life. d. energy.

c. contains information for growth and development.

All organisms possess DNA. DNA a. creates energy for cells. b. allows sensitivity to environmental

stimuli. c. contains information for growth and

development. d. captures energy from the sun.

Controlled Experiment

A procedure to collect data to test a hypothesis

Theory

A conclusion that has been tested over and over; is accepted but can be revised if new evidence is found

homeostasis

Maintaining stable internal conditions

cells

The smallest units of living things

Journals, emails, blogs, tweets

How do scientists communicate data

1. Observation2. Ask a question

3. Form a hypothesis4. Test hypothesis

5. Analyze Data6. Draw a conclusion7. Communicate Data

Write the 7 steps to the scientific method

b. hypothesis

The English physician Ronald Ross knew that the parasite Plasmodium was always found in the blood of malaria patients. He thought that if the Anopheles mosquitoes were responsible for spreading malaria, then Plasmodium would be found in the mosquitoes. This idea was a

a. conclusion c. theory. b. hypothesis. d. scientific

“truth.”

a. with a good idea of the expected experimental results. Scientists usually design experiments a. with a good idea of the expected

experimental results. b. based on wild guesses. c. in order to develop new laboratory

tools. d. All of the above