
Concept explainers
Which of the following is True?
a. Photosynthesis evolved in an atmosphere with little or no oxygen.
b. Photosynthesis occurs only in plants.
c. Oxygen is necessary for photosynthesis.
d. Carbon dioxide is necessary for photorespiration.

Introduction:
Animals use respiration process wherein the exchange of gases and breathing process is attained. The upper and lower respiratory system works in conjunction and achieves the desired function of the respiratory system. Just like animals, plants also use a process of respiring and this is done by the photosynthesis process.
Answer to Problem 1MC
Correct answer:
Photosynthesis is evolved in the atmosphere with almost null of limited oxygen content.
Explanation of Solution
Explanation for the correct answer:
Option (a) is given as photosynthesis has evolved in the atmosphere with no to little oxygen content. During photosynthesis, the plants and other organisms utilize sunlight, water, and carbon dioxide in order to generate oxygen in the atmosphere. The oxygen liberated by the plants into the atmosphere is taken up by the animals and other organisms which depend on the oxygen. Therefore, option (a) is a correct answer.
Explanation for the incorrect answer:
Option (b) is given as photosynthesis occurs only in plants. The photosynthesis occurs in plants and other organisms, which convert the light energy coming from the sun into chemical energy. So, it is an incorrect option.
Option (c) is given as oxygen is necessary for photosynthesis. Carbon dioxide, sunlight, and water are necessary components for photosynthesis process and the final product is the release of oxygen. So, it is an incorrect option.
Option (d) is given as carbon dioxide is necessary for photorespiration. It is seen in higher plants which take up oxygen during the daytime and generate carbon dioxide at night. So, it is an incorrect answer.
Hence, options (b), (c), and (d) are incorrect.
Therefore, it can be concluded that the photosynthesis produces oxygen for other animals and uses up sunlight, water, and carbon dioxide.
Want to see more full solutions like this?
Chapter 7 Solutions
Biology: Life on Earth (11th Edition)
- What is this?arrow_forwardMolecular Biology A-C components of the question are corresponding to attached image labeled 1. D component of the question is corresponding to attached image labeled 2. For a eukaryotic mRNA, the sequences is as follows where AUGrepresents the start codon, the yellow is the Kozak sequence and (XXX) just represents any codonfor an amino acid (no stop codons here). G-cap and polyA tail are not shown A. How long is the peptide produced?B. What is the function (a sentence) of the UAA highlighted in blue?C. If the sequence highlighted in blue were changed from UAA to UAG, how would that affecttranslation? D. (1) The sequence highlighted in yellow above is moved to a new position indicated below. Howwould that affect translation? (2) How long would be the protein produced from this new mRNA? Thank youarrow_forwardMolecular Biology Question Explain why the cell doesn’t need 61 tRNAs (one for each codon). Please help. Thank youarrow_forward
- Molecular Biology You discover a disease causing mutation (indicated by the arrow) that alters splicing of its mRNA. This mutation (a base substitution in the splicing sequence) eliminates a 3’ splice site resulting in the inclusion of the second intron (I2) in the final mRNA. We are going to pretend that this intron is short having only 15 nucleotides (most introns are much longer so this is just to make things simple) with the following sequence shown below in bold. The ( ) indicate the reading frames in the exons; the included intron 2 sequences are in bold. A. Would you expected this change to be harmful? ExplainB. If you were to do gene therapy to fix this problem, briefly explain what type of gene therapy youwould use to correct this. Please help. Thank youarrow_forwardMolecular Biology Question Please help. Thank you Explain what is meant by the term “defective virus.” Explain how a defective virus is able to replicate.arrow_forwardMolecular Biology Explain why changing the codon GGG to GGA should not be harmful. Please help . Thank youarrow_forward
- Stage Percent Time in Hours Interphase .60 14.4 Prophase .20 4.8 Metaphase .10 2.4 Anaphase .06 1.44 Telophase .03 .72 Cytukinesis .01 .24 Can you summarize the results in the chart and explain which phases are faster and why the slower ones are slow?arrow_forwardCan you circle a cell in the different stages of mitosis? 1.prophase 2.metaphase 3.anaphase 4.telophase 5.cytokinesisarrow_forwardWhich microbe does not live part of its lifecycle outside humans? A. Toxoplasma gondii B. Cytomegalovirus C. Francisella tularensis D. Plasmodium falciparum explain your answer thoroughly.arrow_forward
- Select all of the following that the ablation (knockout) or ectopoic expression (gain of function) of Hox can contribute to. Another set of wings in the fruit fly, duplication of fingernails, ectopic ears in mice, excess feathers in duck/quail chimeras, and homeosis of segment 2 to jaw in Hox2a mutantsarrow_forwardSelect all of the following that changes in the MC1R gene can lead to: Changes in spots/stripes in lizards, changes in coat coloration in mice, ectopic ear formation in Siberian hamsters, and red hair in humansarrow_forwardPleiotropic genes are genes that (blank) Cause a swapping of organs/structures, are the result of duplicated sets of chromosomes, never produce protein products, and have more than one purpose/functionarrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax CollegeBiology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning
- Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxBiology: 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 Learning





