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A.
To explain: The mechanism through which ionizing radiations halt cell division.
Concept introduction: Ionizing radiations are those that ionize atoms or molecules by liberating electrons from their shell with the energy they discharge. Ionizing radiations consist of
B.
To explain: The effect of mutation in a cell that prevents the cell from halting cell division even after exposure to ionizing radiation
Concept introduction: Ionizing radiations are those that ionize atoms or molecules by liberating electrons from their shell with the energy they discharge. Ionizing radiations consist of electromagnetic (EM) waves at the high end of the EM spectrum, atoms, ions, and subatomic particles moving at high velocity. Examples of ionizing radiations include γ-rays, X-rays, and UV rays of high end EM spectra. Specialized instruments are used to measure the levels of ionizing radiations, as they cause hazardous effects on the cells by damaging the DNA thereby cell death.
C.
To explain: The effect of mutation in a cell that prevents the cell from halting cell division, but the cell is unexposed to ionizing radiation
Concept introduction: Ionizing radiations are those that ionize atoms or molecules by liberating electrons from their shell with the energy they discharge. Ionizing radiations consist of electromagnetic (EM) waves at the high end of the EM spectrum, atoms, ions, and subatomic particles moving at high velocity. Examples of ionizing radiations include γ-rays, X-rays, and UV rays of high end EM spectra. Specialized instruments are used to measure the levels of ionizing radiations, as they cause hazardous effects on the cells by damaging the DNA thereby cell death.
D.
To explain: The reason why adult human beings should avoid large doses of ionizing radiation as it leads to death.
Concept introduction: Ionizing radiations are those that ionize atoms or molecules by liberating electrons from their shell with the energy they discharge. Ionizing radiations consist of electromagnetic (EM) waves at the high end of the EM spectrum, atoms, ions, and subatomic particles moving at high velocity. Examples of ionizing radiations include γ-rays, X-rays, and UV rays of high end EM spectra. Specialized instruments are used to measure the levels of ionizing radiations, as they cause hazardous effects on the cells by damaging the DNA thereby cell death.
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Chapter 18 Solutions
Essential Cell Biology
- 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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