Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 12, Problem 11PIAT
The bark of the Pacific yew tree (Taxusbrevifolia) was the original source of one of the most effective drugs for treating tumors of the breast, lung, and other sites. Taxol, a chemical extracted from this bark, kills actively replicating cells by inhibiting the depolymerization of microtubules. Why are microtubules good targets for killing cancerous cells?
During what phases in the cell cycle would you expect there to be large changes in the
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4. This question focuses on entrainment.
a. What is entrainment?
b. What environmental cues are involved in entrainment, and which one is most influential?
c. Why is entrainment necessary?
d. Assuming that a flash of darkness is an effective zeitgeber, what impact on circadian
rhythms would you expect to result from an event such as the 2024 solar eclipse (assume
it was viewed from Carbondale IL, where totality occurred at about 2 pm)? Explain your
reasoning. You may wish to consult this phase response diagram.
Phase Shift (Hours)
Delay Zone
Advance Zone
Dawn
Mid-day
Dusk
Night
Dawn
Time of Light Stimulus
e. Finally, give a real-world example of how knowledge of circadian rhythms and
entrainment has implications for human health and wellbeing or conservation biology.
This example could be from your reading or from things discussed in class.
Generate one question that requires a Punnet Squre to solve the question. Then show how you calculate the possibilities of genotype and phenotype
Briefly state the physical meaning of the electrocapillary equation (Lippman equation).
Chapter 12 Solutions
Biological Science (7th Edition)
Ch. 12 - 1. Which statement about the daughter cells...Ch. 12 - After S phase, what comprises a single chromosome?...Ch. 12 - Progression through the cell cycle is regulated by...Ch. 12 - 4. What major events occur during anaphase of...Ch. 12 - 5. Identify at least two events in the cell cycle...Ch. 12 - 6. What evidence suggests that during anaphase,...Ch. 12 - 7. Evaluate each of the following defects. Which...Ch. 12 - Prob. 8TYUCh. 12 - Prob. 9TYPSSCh. 12 - Prob. 10TYPSS
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- Explain in a small summary how: What genetic information can be obtained from a Punnet square? What genetic information cannot be determined from a Punnet square? Why might a Punnet Square be beneficial to understanding genetics/inheritance?arrow_forwardIn a small summary write down:arrow_forwardNot part of a graded assignment, from a past midtermarrow_forward
- Noggin mutation: The mouse, one of the phenotypic consequences of Noggin mutationis mispatterning of the spinal cord, in the posterior region of the mouse embryo, suchthat in the hindlimb region the more ventral fates are lost, and the dorsal Pax3 domain isexpanded. (this experiment is not in the lectures).a. Hypothesis for why: What would be your hypothesis for why the ventral fatesare lost and dorsal fates expanded? Include in your answer the words notochord,BMP, SHH and either (or both of) surface ectoderm or lateral plate mesodermarrow_forwardNot part of a graded assignment, from a past midtermarrow_forwardNot part of a graded assignment, from a past midtermarrow_forward
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