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Concept explainers
Introduction:
Biological diversity, biodiversity, is the variations in different species and the ecosystems in which these species survive. Biodiversity is studied in three stages, species diversity, genetic diversity, and ecosystem diversity.
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Answer to Problem 1TY
Option (d), a species that is in danger of becoming extinct throughout all or a significant portion of its range.
Explanation of Solution
Explanation/justification for the correct answer:
Option (d), a species that is in danger of becoming extinct throughout all or a significant portion of its range. Endangered species are those species that are on the verge of extinction throughout the world. Hence, this option is correct.
Explanation/justification for the incorrect answer:
Option (a), a species that is likely to become extinct in a portion of its range. Endangered species are not the ones whose population is decreasing in the given range but in the whole world. Hence, this option is incorrect.
Option (b), a species that has disappeared in a particular community but is present in other natural environments. Endangered species are not the ones whose population is decreasing in the given range but in the whole world. Hence, this option is incorrect.
Option (c), a species that is extinct. Extinct species are those species whose even one organism is not present on this planet to continue life. While endangered species are those with a limited population. Hence, this option is incorrect.
Option (e) is both b and d. Among the given options, option d is correct. Hence, this option is incorrect.
Among the answers given, a correct answer is an option (d), a species that is in danger of becoming extinct throughout all or a significant portion of its range.
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Chapter 47 Solutions
EBK PRINCIPLES OF 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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