bio lab 1

Which of the following is the correct meaning of the prefix "milli"?

1/1000

Approximately how many quarts of soda are in a 2 liter bottle?

2

Room temperature water is often described as tepid or lukewarm. A Celsius thermometer placed in room temperature water should record approximately which temperature?

25 degrees C

2584 centimeters corresponds to __ meters.

25.84

Normal body temperature when taken orally is about 98.6 degrees Fahrenheit. If you used a Celsius thermometer, what would the reading be?

37 degrees c

A good scientific experiment is reproducible.what does that mean?

Anyone can conduct the same experiment in another lab and expect to get the same results

The dispersal of fat molecules in water is called

Emulsion

A wet mount is time consuming

False

Which best describes the diet of pillbugs?

Omnivore

When you measure the diameter of a circle, which length are you measuring?

along a line dividing the circle in half at its widest poinit

After they are used, reusable instruments or glassware that require sterilization should be placed in the

autoclave

In addition to storing carbon and energy, what else are lipids used for in cells?

constructing membranes

Information about hazards posed by chemicals used in the lab can consistently be found

on the material safety data sheet

Using both chambers in the pillbug experiment allows you to

perform a control experiment

When should the lab bench be cleaned and disinfected?

prior to the lab activity, after the completion of the lab activities

Which of the following is a defense mechanism of pillbugs against predation?

rolling in a ball

How should a subject be chosen to be part of a control group or an experimental group?

selection should be random

How many pounds are in 1 gram?

0.0022lbs

Which is heavier, 1 gram or 1 pound?

1 pound

Which of the following is the major difference between proteins, polypeptides and peptides?

length

Which category of macromolecules is classified as a group based upon insolubility in water?

lipids

What do you do in the LabSmart's hypothesis phase?

make a strategy for the experiment, formulate the hypothesis

What do you do during an analysis phase?

make calculations based on the raw measurements, judge whether the hypothesis is supported by the results, graph the results

How are the metric units of measurement different that the standard system used in the U.S.?

metric units are based on multiples of 10, the metric system is used in more countries worldwide

Where are the pill bugs organs of smell?

on the antennae

Which question can you ask yourself to determine the dependent variable of an experiment?

what will I measure

Why is it important to perform an experiment with a control?

without a control, a positive test could have been explained by some other factor causing a false positive, without a control, a negative test could have been explained by some other factor causing a false positive

You decide to test your pillbugs' preference for an acidic environment versus a non-acidic environment. On one side of the chamber you place filter paper moistened with water. What is the appropriate to place on the other side to test this variable?

filter paper moistened with vinegar

Which best describes the pillbug's organ of respiration?

gills

Inconsistent ratios between sample solutions and reagent result in:

inconsistent test results

Besides storing carbon, having structural functions and being involved in communication, what other role do carbohydrates have?

storing energy

Scientific results that have undergone tests are

systematic, reproducible

Which of the following are functions of proteins?

they act as catalysts, they can be structural, they can be for signaling, they can play a role in the immune system

Not boiling the Benedict's test long enough can result in a false negative.

true

When measuring the length of irregular objects like bones, which of the following is important to do?

use a straight edge or caliper to line up the ends of the object along a ruler

In the chemical composition experiment, the negative control tube contained __.

water