Concept explainers
a.
To describe: The reason due to which only root apical meristem cells contain radioactive thymidine at 0 hours of incubation.
Introduction: Tips of roots and shoots consist of apical meristem tissues. They can differentiate into different types of cells. Division and growth in meristematic tissue lead to the growth of plants.
b.
To calculate: The percentage of radioactive cells, plotting radioactive cells percentage over time.
Introduction: Apical meristems are present at tips of root and shoots divide to form new cells and increase the length of roots and shoots.
c.
To analyze: Rise and fall in the percentage in radioactive cells in each region.
Introduction: Apical meristem divides continuously that result in the growth of the plant. Meristematic tissues are present at tips of roots and shoots.
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Chapter 23 Solutions
PRINCIPLES OF LIFE - LAUNCHPAD (1 TERM)
- What is the opening indicated by the pointer? (leaf x.s.) stomate guard cell lenticel intercellular space none of thesearrow_forwardIdentify 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_forward
- 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
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