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To explain: The reasons why cells go to great lengths of variability to ensure the fidelity of
Introduction: Mutations are the permanent alteration of
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Explanation of Solution
A single mutation has got a very large effect on the genome of every organism. Usually, evolutionary changes always results from many mutations with small effects. For bringing some desirable variations in the genetic configuration, it is very necessary that the changes produced should be very stable, variant, and a healthy balance must be followed in-between these two. The rate of mutation also has a significant role in the existence of the respective species; if the rate is too high, it would result in the gradual disappearance of the organisms.
The adaptation of every species that has gone through mutation relies in its fidelity of DNA replication. This is so that any error in the replication will be automatically corrected so that it won’t produce any negative effect to the organism; this is what is called as genetic memory. However, in many cases, it is very essential for the organism to make some changes in a DNA sequence. At these times, desirable changes will be produced as they are very crucial for the survival of the organism. These changes will persist only by selection. If such changes have no significant role, they will not be accumulated and if such changes are devastating, then the organism will die as a result of natural selection.
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Chapter 9 Solutions
Essential Cell Biology 5e
- Identify the indicated tissue? (stem x.s.) parenchyma collenchyma sclerenchyma ○ xylem ○ phloem none of thesearrow_forwardWhere did this structure originate from? (Salix branch root) epidermis cortex endodermis pericycle vascular cylinderarrow_forwardIdentify the indicated tissue. (Tilia stem x.s.) parenchyma collenchyma sclerenchyma xylem phloem none of thesearrow_forward
- Identify 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_forwardWhat type of cells flank the opening on either side? (leaf x.s.) vessel elements sieve elements companion cells tracheids guard cells none of thesearrow_forward
- What 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_forwardIdentify the tissue. parenchyma collenchyma sclerenchyma ○ xylem O phloem O none of thesearrow_forward
- Please 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_forwardYou 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_forward
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