This topic contains a solution. Click here to go to the answer

Author Question: After reading the paragraphs below, answer the questions that follow.Plants differ from many animals ... (Read 68 times)

azncindy619

  • Hero Member
  • *****
  • Posts: 562
After reading the paragraphs below, answer the questions that follow.

Plants differ from many animals because they undergo indeterminate (continual) growth. Indeterminate growth is common in clonal plants because a single clone can continually produce new clones without undergoing sexual reproduction, even if the plant is capable of doing so.

Senescence, an inability to undergo cell division as an organism ages, also occurs in many plants and animals. However, scientists have had a difficult time establishing the occurrence of senescence in cloning plants because of their indeterminate growth patterns. Mutations in somatic cells are common during asexual growth, and these mutations lead to a decrease in sexual fitness. Scientists hypothesize that over time, as these mutations accumulate, they may contribute to senescence in clonal plants. To test this theory, scientists studied a naturally growing population of trembling aspen (Populus tremuloides), a tree species that grows clones from its root system but is capable of sexual reproduction. To determine if trembling aspens senesce, they compared genetic data of estimated tree age with the variable of "diminishing fertility": the amount of pollen released by male aspen trees. Here are the results for this part of the study:


Source: Adapted from Ally, D., Ritland, K., & Otto, S. P. (2010). Aging in a long-lived clonal tree. PLoS Biol, 8(8): e1000454. doi:10.1371/journal.pbio.1000454.


With each successive generation of clones, the number of genetic mutations in the aspens' DNA increases, causing disruptions in pollen production. If mutation frequency were graphed per age of clones, what would the graph look like? Assume for each of these graphs that age increases moving from left to right on the x-axis and the total number of accumulated mutations increases from bottom to top on the y-axis.









Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by azncindy619 on Jul 15, 2019

frejo

  • Sr. Member
  • ****
  • Posts: 349
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 25% of students answer this correctly





 

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

For a complete list of videos, visit our video library