Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Videos
Question
Chapter 48, Problem 2DAA
Summary Introduction
To determine: The PCB concentration in the women that influence likely to give birth to daughters.
Concept introduction:
Imbalance in sex ratio may arise as an effect of various factors such as natural factors, exposure to various contaminated chemicals, pesticides, and other environmental contaminants. Polychlorinated Biphenyls (PCBs) are widespread environmental contaminants that possess teratogenic and oncogenic properties. These chemicals increase the male/female ratio. The maternal contamination with PCBs is also connected with low birth weight and shorter height in males.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
With reference to the phosphorus cycle, explain the benefits of phosphate solubilizing microorganisms to plants and Discuss how the activities of symbionts in a mutualistic association can lead to microbial weathering (1000 words).
A dietary deficiency of iodine will lead to which of the following?
Question 89 options:
a)
Decreased production of thyrotropin-releasing hormone (TRH)
b)
An increased secretion of thyroid-stimulatory hormone (TSH)
c)
A direct effect on the synthesis of thyroglobulin on ribosomes
d)
Decreased gene expression due to the inability of receptors to bind to DNA
Considering the solutions discussed in the lecture, in your opinion, what could have been done to stop the extermination of the thylacine? Can you think of another predator today that is being exterminated as a result of man's fear and ignorance? hint: they are an American species just recently introduced to the Northern Rocky Mountains. Do a google search and write about this current issue. Who? Where? Why?
Chapter 48 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What is a potential role of methanogens in global warming? Methanogens produce methane, which traps more heat than carbon dioxide and may contribute to global warming. Methanogens convert carbon dioxide into methane, removing carbon dioxide from the atmosphere and effectively decreasing global warming. The methane that methanogens produce during sludge digestion of wastewater treatment is burned so that it does not contribute to global warning. Methanogens convert methane gas produced by organic waste into carbon dioxide, decreasing global warming.arrow_forwardOn the lush exomoon Pandora, scientists found a type of frog call the “balbasaur frog” whose males capture and present fluorescent pink “woodsprite” (a jellyfish-like flying invertebrate) to females during courtship. Scientists have made a few other observations about this system. (1) The woodsprite contains a microelement that is highly nutritious for the frogs. (2) The woodsprite are erratic flyers and only male frogs with the best hunting skills can capture them. (3) Female frogs live in dark caves and hunt cave-dwelling worms that are pink. (4) Females prefer males that present woodsprite during courtship. Given these observations, which of the following is likely an explanation for the female preference for the bright pink woodsprite? Direct benefit Sensory drive Indicator hypothesis All of the above Female balbasaur frogs typically mate multiply during a mating season. Females have multiple pouches for sperm storage and sperm from different males are stored in separate…arrow_forwardCan somone help me to answer 2 question after watching a video, Thank you https://www.youtube.com/watch?v=M18HxXve3CM 1)What is one interesting or surprising thing you learned from the video you watched? 2)It’s unlikely that you personally hunt wolves or whales, and equally unlikely that you are responsible for importing rabbits and foxes to Australia as shown in these videos. But your actions do affect ecosystems. What is one thing you can start doing or stop doing right away to help protect the earth’s ecosystems? Explain how the thing you chose helps to protect ecosystems.arrow_forward
- In 1994, the U.S. Public Health Service identified “10 Essential Public Health Services.” For each of the ten, please briefly describe a specific activity that has been used in the response to COVID-19.arrow_forwardIn 1994, the U.S. Public Health Service identified “10 Essential Public Health Services.” For each of the ten, briefly describe a specific activity that has been used in the response to COVID-19.arrow_forwardBruce Ames and his colleagues have pointed out that although detailed toxicological analysis has been conducted on synthetic chemicals, almost no information is available about the mutagenic or carcinogenic effects of the toxins produced by plants as a natural defense against fungi, insects, and animal predators. Tens of thousands of such compounds have been discovered, and he estimates that in the United States adults eat about 1.5 g of these compounds each daylevels that are approximately 10,000 times higher than those of the synthetic pesticides present in the diet. For example, cabbage contains 49 natural pesticides and metabolites, and only a few of these have been tested for their carcinogenic and mutagenic effects. a. With the introduction of new foods into the U.S. diet over the last 200 years (mangoes, kiwi fruit, tomatoes, and so forth), has there been enough time for humans to develop resistance to the mutagenic effects of the toxins present in those foods? b. The natural pesticides present in plants constitute more than 99% of the toxins we eat. Should diet planning, especially for vegetarians, take into account the doses of toxins present in the diet?arrow_forward
- The chemical representation of algae is C106H263O110N16P. The Gulf of Mexico contains 0.2 mg/L of nitrogen and 0.08 mg/L of phosphorus. a.Which is the limiting nutrient for algal growth in the water? Assume all other nutrients are abundant. b.What will be the mass of algae produced per liter of water (mg/L) in an algal bloom? c.If the nitrogen source is reduced by 50%, would the algae production also decrease by half? d.If the phosphorus source is reduced by 50%, would the algae production also decrease by half?arrow_forwardAmoeboid cells that migrate through our tissues, such as the class of white blood cells known as neutrophils, often do so in a directed manner, triggered, for instance, by chemical signals released by pathogens such as bacteria. Directed migration in response to a chemical stimulus is known as chemotaxis. Part of an efficient chemotactic response is the ability of cells to polarize. As is the case with our structurally-polar polymers like F-actin or microtubules, polarization here refers to an asymmetry in the cells, rather than an electrical charge. In this case, it involves one part of the cell becoming the “front” (or leading edge) and another the rear. In a well-polarized, migrating cell, it’s been observed that an active form of Rac (which, in turn, can activate ARP 2/3) is concentrated towards the front of the cell, whereas an active form of Rho (which, in turn, can activate formin, inhibit cofilin/ADP, and activate myosin II) is found toward the rear of the cell. Based on your…arrow_forwardAmoeboid cells that migrate through our tissues, such as the class of white blood cells known as neutrophils, often do so in a directed manner, triggered, for instance, by chemical signals released by pathogens such as bacteria. Directed migration in response to a chemical stimulus is known as chemotaxis. Part of an efficient chemotactic response is the ability of cells to polarize. As is the case with our structurally-polar polymers like F-actin or microtubules, polarization here refers to an asymmetry in the cells, rather than an electrical charge. In this case, it involves one part of the cell becoming the “front” (or leading edge) and another the rear. In a well-polarized, migrating cell, it’s been observed that an active form of Rac (which, in turn, can activate ARP 2/3) is concentrated towards the front of the cell, whereas an active form of Rho (which, in turn, can activate formin, inhibit ADP, and activate myosin II) is found toward the rear of the cell. Based on your…arrow_forward
- At a global scale, harmful algal blooms (HABS) are appearing in many places, often new places, and lasting longer than previously recorded. Across Florida, the occurrence of algal blooms, caused by various species of phytoplankton, has been intensifying. In the summer of 2016, a state of emergency was declared because a toxic cyanobacterial bloom occurred in Lake Okeechobee which spread into and throughout the St. Lucie River and Estuary. Water samples collected during the bloom helped identify a limiting nutrient. 1. Data from a Burger et al. (2004) indicate that mercury levels in Florida gar, top-level predators, from Lake Okeechobee were not higher than mercury levels of fish muscle from other locations in the United States. However, mercury levels in the livers of Florida gar were above the level considered safe for human consumption. a. Explain why this is good news for people who fish in Lake Okeechobee. b. Explain why this is bad news for non-human consumers of fish, and how it…arrow_forward(c) Which phase of cell growth is disrupted by antimetabolites? Explain how as folate methotrexate functions antagonist. antimabolitesarrow_forwardRegarding nitrogen fixation, are the following statements True or False? a) Atmospheric nitrogen is reduced to the biologically useful form NH3 (or NH4 ). b) Nitrogen fixation in nature and in the lab requires a metal cofactor or catalyst. c) The availability of fixed nitrogen limits biological productivity. d) Ammonium from the atmosphere is fixed to more usable forms of nitrogen, such as nitrite (NO2–). e) Nitrogen fixation is energetically neutral, using a negligible amount of ATP. f) The enzyme nitrogenase, which takes part in nitrogen fixation, is inactivated by oxygen.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning
Essentials of Pharmacology for Health ProfessionsNursingISBN:9781305441620Author:WOODROWPublisher:Cengage
Human Heredity: Principles and Issues (MindTap Co...
Biology
ISBN:9781305251052
Author:Michael Cummings
Publisher:Cengage Learning
Essentials of Pharmacology for Health Professions
Nursing
ISBN:9781305441620
Author:WOODROW
Publisher:Cengage
What is a Primary and Secondary Metabolite?; Author: Unicity International;https://www.youtube.com/watch?v=TRNUURm0agM;License: Standard Youtube License