![Biological Science (6th Edition)](https://www.bartleby.com/isbn_cover_images/9780321976499/9780321976499_largeCoverImage.gif)
Concept explainers
True or false? Some trails are considered vestigial because they existed long ago.
![Check Mark](/static/check-mark.png)
To review:
Correctness or Incorrectness of the statement “The traits that are considered vestigial because they came into existence long ago.”
Introduction:
The vestigial trait involves the structures that are incomplete or less developed in an organism that has reduced function or no function. These structures are often homologous to the normally functioning structures in closely related species or ancestral species.
Explanation of Solution
The vestigial traits are considered as the evidence of evolution, which justifies that certain characteristics of the species have changed with the progression of time. Vestigial traits are underdeveloped or reduced traits. These traits are considered vestigial only when they do not perform the similar function as that in the other species.
For example, the tailbone that is present in the humans has a reduced function. It is no more used for locomotion or to maintain the balance in humans. Appendix is a well-known vestigial human organ showing relation of humans with primate ancestors, part of digestion system associated with digestion of cellulose-rich plants. All the traits that existed long ago are not considered vestigial because they might perform a similar function, for which it was designed.
The statement is false because not all the traits that existed long ago are considered vestigial. Only those traits that have a reduced or no function, designed by nature are considered vestigial organs.
Want to see more full solutions like this?
Chapter 22 Solutions
Biological Science (6th Edition)
Additional Science Textbook Solutions
Introductory Chemistry (6th Edition)
Microbiology: An Introduction
Human Anatomy & Physiology (2nd Edition)
Campbell Biology in Focus (2nd Edition)
Human Physiology: An Integrated Approach (8th Edition)
Genetic Analysis: An Integrated Approach (3rd Edition)
- List substitutions in your diet you could make to improve it based on what you know now about a balanced diet. For instance, if you like to drink soda, you might substitute skim milk or water for some of the soft drinks you consumed. List the item you wish to replace with the new item and what you hope to accomplish with that substitution. Be sure to choose foods you know that you'd enjoy and you consider more "healthful." If you feel your diet is already balanced, describe how you accomplish your balanced intake and when you began eating this way.arrow_forwardWhich single food item contained you ate for the 3 days with the most sodium?arrow_forwardSelect a diet and choose one site that provides credible information. Explain why the source itself and/or the information on the site is credible. This should be a report. This site should be different from U.S News and World Report. For full credit, you must include the following information and elaborate in detail: The diet name The main components of the diet The credible website name and link What makes the credible website credible?arrow_forward
- Select a diet and give a summary of the main components. Do a web search of the diet and choose one link that provides misinformation. Explain why the site itself and/or the information on the site is not credible. This should be a report. This site should be different from U.S News and World Report. For full credit, you must include the following information and elaborate in detail: The diet name The main components of the diet The misinformation website and link What misinformation is being provided in the other website and how did you determine it was not credible?arrow_forward1. In vivo testing provides valuable insight into a drug’s kinetics. Assessing drug kinetics following multiple different routes of administration provides greater insight than just a single route of administration alone. The following data was collected in 250 g rats following bolus iv, oral (po), and intraperitoneal (ip) administration.Using this data and set of graphs, determine: (a) k, C0, V, and AUC* for the bolus iv data (b) k, ka, B1, and AUC* for the po data (c) k, ka, B1, and AUC* for the ip data (d) relative bioavailability for po vs ip, Fpo/Fip (e) absolute po bioavailability, (f)Fpo absolute ip bioavailability, Fip MAKE SURE ANSWERS HAVE UNITS if appropriate. SHOW ALL WORK, including equation used, variables used and each step to your solution.arrow_forward2. Drug quantification from plasma is commonly performed by using techniques such as HPLC or LC/MS. However, these methods do have limitations, and investigators may choose to use a radiolabeled analog of a drug instead. Radioligands are molecules that contain radioactive isotopes, commonly 3H or 14C. This technique allows investigators to quantify drug concentration from radiation measurements. The following measurements were made in 250 g rats following oral administration of 18.2 µCi of a 14C-labeled drug of interest: Time (min) Plasma Radiation Levels (µCi/L) 0 0.0 2 9.7 4 19.2 7 25.3 9 37.8 12 39.6 14 45.8 17 48.8 20 52.0 25 56.4 30 59.2 35 60.1 40 61.1 45 62.1 50 62.8 60 63.1 70 62.1 80 60.1 90 57.3 100 55.5 110 53.7 120 52.2 150 48.0 180 45.0 240 39.0 Note that a µCi is a measure of the amount of radioactivity and hence is a measure of the amount of drug present. Given that the oral bioavailability of this drug is known to be essentially 100%, estimate the following from this…arrow_forward
- The current nutrition labelling regulation in Hong Kong requires food manufacturer to list E+7 information on the package of pre-packaged food products. Do you think that more nutrients, such as calcium and cholesterol, shall be included?arrow_forwardView History Bookmarks Window Help Quarter cements ents ons (17) YouTube Which amino acids would you expect to find marked on the alpha helix? canvas.ucsc.edu ucsc Complaint and Grievance Process - Academic Personnel pach orations | | | | | | | | | | | | | | | | 000000 000000000 | | | | | | | | | | | | | | | | | | | | | | 00000000 scope vious De 48 12.415 KATPM FEB 3 F1 F2 80 F3 a F4 F5 2 # 3 $ 85 % tv N A の Mon Feb 3 10:24 PM Lipid bilayer Submit Assignment Next > ZOOM < Å DII 8 བ བ F6 16 F7 F8 F9 F10 34 F11 F12 & * ( 6 7 8 9 0 + 11 WERTY U { 0 } P deletearrow_forwardDifferent species or organisms research for ecologyarrow_forward
- What is the result of the following gram stain: positive ○ capsulated ○ acid-fast ○ negativearrow_forwardWhat type of stain is the image below: capsule stain endospore stain gram stain negative stain ASM MicrobeLibrary.org Keplingerarrow_forwardWhat is the result of the acid-fast stain below: Stock Images by Getty Images by Getty Images by Getty Images by Getty Image Getty Images St Soy Getty Images by Getty Images by Getty Images Joy Getty encapsulated O endosporulating negative ○ positivearrow_forward
- Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning
- Case Studies In Health Information ManagementBiologyISBN:9781337676908Author:SCHNERINGPublisher:Cengage
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305117396/9781305117396_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305967359/9781305967359_smallCoverImage.gif)