Concept explainers
To determine: The most common type of birth defect in the single-birth group.
Introduction: During the gestation period, the mother can have single birth or multiple births. Single birth is where the mother carries only one fetus during the gestation period in the womb. Multiple births are where more than one fetus is carried during the gestation period, such as twins, triplets, quadruplets, and more. Carrying more than one fetus in the womb results in insufficient supply of nutrient to the developing fetus. These fetuses become still-born or born with abnormalities.
Explanation of Solution
Scientist YT studied the correlation between birth defects and multiple births in City F from 1996 to 2000. The scientist calculated the relative risk of birth defect with factors including type of birth, maternal age, economy, race, and medical care provided during pregnancy. The relative risks were calculated using a scale of 1. Relative risk lesser than 1 indicate that multiple births possess less risk of the occurrence of respective birth defects. Relative risk greater than 1 indicates that multiple births do possess a greater risk of the same. The generated data are given in Fig. 42.16.
According to the study, heart defects were the most common type of birth defect in the single-birth group, which may be due to genetic disorders.
The most common type of birth defect in the single-birth group is heart defects.
Want to see more full solutions like this?
Chapter 42 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
- Other than oil and alcohol, are there other liquids you could compare to water (that are liquid at room temperature)? How is water unique compared to these other liquids? What follow-up experiment would you like to do, and how would you relate it to your life?arrow_forwardSelection of Traits What adaptations do scavengers have for locating and feeding on prey? What adaptations do predators have for capturing and consuming prey?arrow_forwardCompetition Between Species What natural processes limit populations from growing too large? What are some resources organisms can compete over in their natural habitat?arrow_forward
- Species Interactions Explain how predators, prey and scavengers interact. Explain whether predators and scavengers are necessary or beneficial for an ecosystem.arrow_forwardmagine that you are conducting research on fruit type and seed dispersal. You submitted a paper to a peer-reviewed journal that addresses the factors that impact fruit type and seed dispersal mechanisms in plants of Central America. The editor of the journal communicates that your paper may be published if you make ‘minor revisions’ to the document. Describe two characteristics that you would expect in seeds that are dispersed by the wind. Contrast this with what you would expect for seeds that are gathered, buried or eaten by animals, and explain why they are different. (Editor’s note: Providing this information in your discussion will help readers to consider the significance of the research).arrow_forwardWhat is the difference between Uniporters, Symporters and Antiporters? Which of these are examples of active transport?arrow_forward
- What are Amyloid Fibrils? What biological functions are these known to perform?arrow_forwardHow do histamine and prostaglandins help in the mobilization of leukocytes to an injury site? What are chemotactic factors? How do they affect inflammation process?arrow_forwardCompare and contrast neutrophils and macrophages. Describe two ways they are different and two ways they are similar.arrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningBiology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781305073951Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage LearningNutrition Through The Life CycleHealth & NutritionISBN:9781337919333Author:Brown, Judith E.Publisher:Cengage Learning,
- Case Studies In Health Information ManagementBiologyISBN:9781337676908Author:SCHNERINGPublisher:CengageBiology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781337408332Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage Learning