Maize vs. Teosinte

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Part I – Maize vs. TeosinteThanksgiving is Emily’s favorite holiday. After a few months of cafeteria food at college, she was very thankful for the sumptuous meal set out in front of her. Everything was perfect, if only her big brother would stop teasing her. “Hey, you’re a biology major, so you must know where this is from, right?” Ted winked at her from across the table while picking up a corn on the cob from his plate. Emily hated to admit that she didn’t know. Clearing her throat, she said, “Well, we haven’t covered this in class, but I will tell you all about it next time.” Once back on campus, the first thing Emily did was to find her biology professor. “Professor, could you tell me where our food comes from? Like, the corn. Does it grow on trees?” Emily asked eagerly. “Hmm, I know just the right video for you to watch,” Professor Griffin said slowly while pushing his purple-rimmed glasses up along his nose. Watch this video with Emily and help her answer the following questions. If you are short on time, you can watch this video from the 0:00 to 4:35 minute mark, and then from the 12:20 to 13:24 minute mark.Popped Secret: The Mysterious Origin of Corn. HHMI BioInteractive Video.http://www.hhmi.org/biointeractive/popped-secret-m…

Questions1.Corn (maize) was domesticated around 9,000 years ago through artificial selection. Ancient farmers selectively planted kernels from plants with desirable traits, such as bigger kernels, ease of harvest, and better taste. During this time, the wild ancestor of maize, teosinte, has been under natural selection that favors those traits that improve the chance of survival and reproduction in the wild.Maize and teosinte look different in many ways. Assign the following pairs of traits to their respective species by circling the correct response, then provide a hypothesis to explain why these traits were favored during natural or artificial selection in the space allotted.

Trait #1:In (maize or teosinte), the seed is encased in a hard fruit case. This trait may be favored during (artificial or natural) selection because __________________________________.In (maize or teosinte), the seed is exposed. This trait may be favored during (artificial or natural) selection because _________________________________________________.

Trait #2:In (maize or teosinte), the plant has one main stalk. This trait may be favored during (artificial or natural) selection because ___________________________________.In (maize or teosinte), the plant has many branches. This trait may be favored during (artificial or natural) selection because ____________________________________.

Trait #3:In (maize or teosinte), the ear breaks apart to release individual kernels at maturity. This trait may be favored during (artificial or natural) selection because ___________________________________________.In (maize or teosinte), the ear remains intact at maturity. This trait may be favored during (artificial or natural)selection because __________________________________.

2.If both maize and teosinte are grown in the wild, which species is more likely to proliferate? Why?

 

 

Sample Solution

Furthermore, a formal selection process provides a way for job applicants to build their self-esteem. Knowing that they would be competing with other candidates, job applicants tend to see the selection process as an opportunity to prove their potentials and skills. Through the selection process, applicants get the chance to prove themselves worthy of the position and in the process build confidence and a stronger personality. In interviews for example, workforces get the chance to express their thoughts and views and in the process show their communication and interpersonal skills. Consequently, these experiences allow individuals to explore their skills and potentials and at the same time develop self esteem.

Going now to training, organizations normally see the training process as a systematic approach to developing and enhancing the skills and capabilities of the workers in a way that would add value to the organization. According to Gerber (2000) the complex nature of the business in the twenty first century calls for highly qualified and competent workforces. Furthermore, Gerber (2000) claimed that work has become more demanding and requiring for a ‘smarter’ workforce. Consequently, the organization may respond to these external pressures by harnessing the skills and capabilities of the workforces, which may be achieved by designing and facilitating training programs for the workforces.

Fundamentally, effective training programs and approaches would guarantee that organization’s workforces are equipped with the appropriate knowledge and information to efficiently perform their tasks (Acton & Golden 2003). Subsequently, trained and efficient workforces tend to produce bett

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