Concept explainers
Introduction:
Energy is defined as the capacity to do work. Living organisms constantly use energy to grow, move, acquire nutrients, and reproduction. In all these processes, there is also a significant loss of energy.

Answer to Problem 1SQ
Correct answer:
Sunlight is life’s primary source of energy. Hence, the correct answer is option c.
Explanation of Solution
Reason for correct answer:
Option c. is given as, “sunlight.”
The energy that fuels most life on Earth comes from the sun. This energy flows through producers such as plants then consumers such as animals. In this journey, the energy is transferred many times. With each transfer, some energy escapes as heat. Eventually, all of it is permanently dispersed. Hence, option c. is correct.
Reason for incorrect answer:
Option a. is given as, “food.”
Food is taken by human beings and animals, but not plants. Plants depend on sunlight for energy. Hence, option a. is incorrect.
Option b. is given as, “water.”
Water does not act as a primary source of energy. It plays an important role in assisting many biological reactions. Hence, option b. is incorrect.
Option d. is given as, “ATP.”
ATP is known as the energy currency of the cell. It is made by the process of glycolysis in which glucose gets break down into pyruvate. It plays an important role in catalyzing many biochemical reactions but is still not considered the primary source of energy. Hence, option d. is incorrect.
Hence, the options a., b., and d. are incorrect.
The life’s primary source of energy is considered to be sunlight. Thus, the correct option is c.
Want to see more full solutions like this?
Chapter 5 Solutions
EBK BIOLOGY: CONCEPTS AND APPLICATIONS
- What did the Cre-lox system used in the Kikuchi et al. 2010 heart regeneration experiment allow researchers to investigate? What was the purpose of the cmlc2 promoter? What is CreER and why was it used in this experiment? If constitutively active Cre was driven by the cmlc2 promoter, rather than an inducible CreER system, what color would you expect new cardiomyocytes in the regenerated area to be no matter what? Why?arrow_forwardWhat kind of organ size regulation is occurring when you graft multiple organs into a mouse and the graft weight stays the same?arrow_forwardWhat is the concept "calories consumed must equal calories burned" in regrads to nutrition?arrow_forward
- You intend to insert patched dominant negative DNA into the left half of the neural tube of a chick. 1) Which side of the neural tube would you put the positive electrode to ensure that the DNA ends up on the left side? 2) What would be the internal (within the embryo) control for this experiment? 3) How can you be sure that the electroporation method itself is not impacting the embryo? 4) What would you do to ensure that the electroporation is working? How can you tell?arrow_forwardDescribe a method to document the diffusion path and gradient of Sonic Hedgehog through the chicken embryo. If modifying the protein, what is one thing you have to consider in regards to maintaining the protein’s function?arrow_forwardThe following table is from Kumar et. al. Highly Selective Dopamine D3 Receptor (DR) Antagonists and Partial Agonists Based on Eticlopride and the D3R Crystal Structure: New Leads for Opioid Dependence Treatment. J. Med Chem 2016.arrow_forward
- The following figure is from Caterina et al. The capsaicin receptor: a heat activated ion channel in the pain pathway. Nature, 1997. Black boxes indicate capsaicin, white circles indicate resinferatoxin. You are a chef in a fancy new science-themed restaurant. You have a recipe that calls for 1 teaspoon of resinferatoxin, but you feel uncomfortable serving foods with "toxins" in them. How much capsaicin could you substitute instead?arrow_forwardWhat protein is necessary for packaging acetylcholine into synaptic vesicles?arrow_forward1. Match each vocabulary term to its best descriptor A. affinity B. efficacy C. inert D. mimic E. how drugs move through body F. how drugs bind Kd Bmax Agonist Antagonist Pharmacokinetics Pharmacodynamicsarrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax CollegeComprehensive Medical Assisting: Administrative a...NursingISBN:9781305964792Author:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy CorreaPublisher:Cengage Learning
- Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage LearningBasic Clinical Lab Competencies for Respiratory C...NursingISBN:9781285244662Author:WhitePublisher:Cengage



