Concept explainers
Which of the following can limit plant growth in nature?
- sunlight
- water
- carbon dioxide
- fixed nitrogen
- all of the above
Introduction:
The primary factors necessary for plant growth are air, light, water, temperature, nutrients. These factors affect the growth hormones making the plant grow quickly or slowly depending on the changes to any of these factors. Light stimulates growth as photosynthesis takes place producing sugars that gets transported to all parts of plants, Water is essential for the transfer of nutrients from soil to plants through roots.
Answer to Problem 1TY
The correct answer is option (e) all of the above
Explanation of Solution
Explanation/justification for the correct answer:
Option (e) all of the above. For plant growth air, light, water, temperature, nutrients, carbon dioxide and nitrogen are essential factors. Even if one of these factors is limited, it will cause stunted growth. Light in adequate amounts and intensity affects the plant shoots and root development. Also, nitrogen and carbon dioxide are essential elements for growth. Another, most important element is water which helps in absorption of nutrients from soil.
Explanation for incorrect answer:
Option (a) sunlight. This is necessary for the development of chlorophyll which helps in photosynthesis. The duration and intensity varies from plant to plant as each will display upper and lower temperature tolerance. Also photosynthesis process increases with increase in temperature. As this is the only option out of others, it is an incorrect answer.
Option (b) water. It is one of the important factors necessary for growth of plants as nutrients are absorbed through it from the soil. The sugar produced by photosynthesis is transported by water to all parts of the plant. As this is only one of the options out of others, it is an incorrect answer.
Option (c) carbon dioxide. This component is absorbed by the plants and in combination with sunlight converts the carbon dioxide and water to produce sugar and oxygen. The sugar is used for growth of plants. Besides carbon dioxide, the other essential factors are light, water. So, this answer is incorrect.
Option (d) fixed nitrogen.Nitrogen in the soil is a critical limiting element for plant growth as it is a major component of chlorophyll which is an important pigment for photosynthesis. It is also essential for amino acids as it is necessary for proteins. This is just one of the factors necessary for plant growth. So, this answer is incorrect.
The most important components that aid in the growth of plant is air, light, water, temperature, nutrients along with carbon dioxide and nitrogen. If one of these factors is limited, it affects the growth of plant. As light is necessary for photosynthesis, the intensity and duration also decides the amount of food produced by the plants. Water, is very important as it helps in absorption of nutrients from the soil.Nitrogen and carbon dioxide are other essential elements for growth.
Hence, the correct answer is option (d) All of the above.
Want to see more full solutions like this?
Chapter 30 Solutions
Principles of Biology
- Identify the indicated tissue. (Tilia stem x.s.) parenchyma collenchyma sclerenchyma xylem phloem none of thesearrow_forwardIdentify the indicated structure. (Cucurbita stem l.s.) pit lenticel stomate tendril none of thesearrow_forwardIdentify the specific cell? (Zebrina leaf peel) vessel element sieve element companion cell tracheid guard cell subsidiary cell none of thesearrow_forward
- What type of cells flank the opening on either side? (leaf x.s.) vessel elements sieve elements companion cells tracheids guard cells none of thesearrow_forwardWhat specific cell is indicated. (Cucurbita stem I.s.) vessel element sieve element O companion cell tracheid guard cell none of thesearrow_forwardWhat specific cell is indicated? (Aristolochia stem x.s.) vessel element sieve element ○ companion cell O O O O O tracheid O guard cell none of thesearrow_forward
- Identify the tissue. parenchyma collenchyma sclerenchyma ○ xylem O phloem O none of thesearrow_forwardPlease answer q3arrow_forwardRespond to the following in a minimum of 175 words: How might CRISPR-Cas 9 be used in research or, eventually, therapeutically in patients? What are some potential ethical issues associated with using this technology? Do the advantages of using this technology outweigh the disadvantages (or vice versa)? Explain your position.arrow_forward
- You are studying the effect of directional selection on body height in three populations (graphs a, b, and c below). (a) What is the selection differential? Show your calculation. (2 pts) (b) Which population has the highest narrow sense heritability for height? Explain your answer. (2 pts) (c) If you examined the offspring in the next generation in each population, which population would have the highest mean height? Why? (2 pts) (a) Midoffspring height (average height of offspring) Short Short Short Short (c) Short (b) Short Tall Short Tall Short Short Tall Midparent height (average height of Mean of population = 65 inches Mean of breading parents = 70 inches Mean of population = 65 inches Mean of breading parents = 70 inches Mean of population = 65 inches Mean of breading parents = 70 inchesarrow_forwardP You are studying a population of 100 flowers that has two alleles at a locus for flower color, blue (B) and green (G). There are 15 individuals with the BB genotype, 70 individuals with the BG genotype, and 15 individuals with the GG genotype. (a) What are the allele frequencies of B and G in the starting population? Show your calculations. (2 pts) (b) Is this population in Hardy-Weinberg equilibrium? Show your calculations. (3 pts) 12pt v Paragraph BIU UA AV & VT2V f CO Varrow_forwardIn a natural population of outbreeding plants, the variance of the total number of seeds per plant is 16. From the natural population, 20 plants are taken into the laboratory and developed into separate true-breeding lines by self- fertilization-with selection for high, low, or medium number of seeds-for 10 generations. The average variance in the tenth generation in each of the 20 sets is about equal and averages 5.8 across all the sets. Estimate the broad-sense heritability for seed number in this population. (4 pts) 12pt v Paragraph BIUA V V T² v B ① O wordsarrow_forward
- Biology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781305073951Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage LearningBiology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning
- Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxBiology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage LearningBiology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning