Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Chapter 2, Problem 15PIAT
Summary Introduction
To review:
The additional information required to determine if AFP is useful in protecting against frost damage.
Introduction:
Antifreeze proteins (AFPs) are a group of polypeptides produced by many animals, plants,
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An experiment is conducted to determine the effect of classical music on the
growth rate of marigolds (flowers). Two groups of plants are grown from seed in
identical soil types, exposed to identical light conditions, and given the same
nutrients. Group A is in a quiet atmosphere. The plants in group B provided with
the same atmosphere, except that classical music is played for twelve hours daily
in this area. The scientist measures the plants in both groups each day and
records the data. In experimental design, Group A is known as.*
experimental group
control group
non-experimental group
O quasi-experimental group
Experiments usually have several controlled variables. These are variables that must be kept constant in all parts of an experiment. For example, if an experiment is testing the effect of sunlight on the growth rate of 5 seeds, the only variable that should change should be the amount of sunlight. All other variables should remain the same to ensure that sunlight is the only aspect affecting the results. The other variables, such as soil type, amount of water, type/amount of fertilizer, are the controlled variables. Looking back at the simulation experiment on the meteorite, describe two variables that should have been controlled.
In a controlled experiment,a scientist is studying how different amounts of sunlight affect growth of tomato plants.what is the dependent variable
Chapter 2 Solutions
Biological Science (6th Edition)
Ch. 2 - Which of the following occurs when a covalent bond...Ch. 2 - If a reaction is exothermic, then which of the...Ch. 2 - 3. Which of the following is most likely to have...Ch. 2 - Prob. 4TYKCh. 2 - 5. Which of the following molecules would you...Ch. 2 - Locate fluorine (F) on the partial periodic table...Ch. 2 - Prob. 7TYUCh. 2 - Prob. 8TYUCh. 2 - Prob. 9TYPSSCh. 2 - From what you have learned about water, why do...
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- An experiment tested the hypothesis that soil pH affects the color of flowers produced by plants. A researcher measured the pH of the soil beneath 1,000 hydrangea plants naturally occurring outside, in a park, and recorded the colors of the flowers on each plant. The researcher found that when the soil pH was about 5.0, hydrangeas produced 99% blue flowers, and when the soil pH was around 7.0, the plants produced 98% red flowers. part a: Which of the following would be an abiotic factor in the plants’ environment? Group of answer choices A. daylength B. pollinators C. insects that eat the plants D. flowers E. birds part b: Did the researcher show that soil pH caused the color of the flowers? Group of answer choices A. Yes, because the researcher included 1,000 plants in the study. B. Yes, because the results very strongly showed the relationship between flower color and soil pH. C. Yes, because the researcher had a clearly stated hypothesis. D. No, because there…arrow_forwardTwo identical plant cell samples of equal mass were taken from the same plant and were prepared for an experiment. Each sample was placed in a different solution. The percent change in mass was recorded and graphed over an eight hour period as shown below. Percent change in mass of plant cells +10+ -10+ Fo Cell Sample in Solution A Cell Sample in Solution B Given the results, which of the following statements is accurate? Time (hours) Select one: a. Solution A was hypertonic and solution B was hypotonic to the plant cells. b. Both solutions were hypertonic to the plant cells. c. Solution A was hypotonic to the plant cells. d. Both solutions were isotonic to the plant cells.arrow_forwardArtificial leaves are beginning to be developed by biotechnology companies. Outline the basic characteristics that an artificial leaf would need to have to manufacture a sugar.arrow_forward
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