SCI 115 Week 3 Discussion STR

Energy for Life / Energy Reactions and Processes

In your primary post, please write a response of at least 125 words to one of the following three topics, using your own words. In addition, please make a substantive reply to a fellow student on any topic.

Topic 1. The phytoplankton that brought Earth to life. Review the video (1)* about the “phytoplankton that brought Earth to life” from the link given below, or from the link in the Instructor’s Insights area. In this clip, which is under 5 minutes in length, Penny Chisholm discusses a tiny phytoplankton called Prochlorococcus. Based on that video, please address the following:

• (a) What is the importance of Prochlorococcus for life on the planet Earth, both historically and in the present day?
• (b) Explain what the known geographic variations in Prochlorococcus tell us about relationships between organisms and their environments.

Topic 2. Characteristics of ATP. If you choose this topic for your primary post, you must base your post on the instructor’s video about ATP (2)*. The video can be found in the Instructor Insights area.

• (a) Describe at least three specific points that the video makes about ATP.
• (b) Explain how this fits with this week’s lessons.
• Please note that I am looking for specific points that are covered in the video, so material gleaned from Wikipedia or other sources may not meet the requirements.

Topic 3. Chemosynthesis in the Giant Tubeworm. The Giant Tubeworm (Riftia pachyptila) is an animal that lives on the floor of the ocean, near hydrothermal vents that release very hot, chemical-rich water. The adult form of the tubeworm is sessile, which means that it plants itself in one place, and doesn’t have any locomotion. Riftia pachyptila has a unique way of getting the energy that it needs to stay alive (3)* (4)* (5)*.

• (a) Describe how Riftia pachyptila gets its energy.
• (b) Discuss how this relates to this week’s lessons.

References*

1. PBS Newshour, March 5, 2014, The phytoplankton that brought Earth to life, https://youtu.be/m_43nR11PW8
2. James Cox, 2015, Four minutes about ATP, see Kaltura video via the “Instructor’s Insights” area for Week 3.
3. Deep Marine Scenes, 2013, Facts: Giant tube worms, https://www.youtube.com/watch?v=IddCPTnmj4Q
4. JKM12988, December 5, 2016, Giant tube worms and symbiotic bacteria, https://www.youtube.com/watch?v=dg6ZewBTRj8&t=6s
5. Kristen M. Kusek, January 12, 2007, Deep-sea tubeworms get versatile ‘inside’ help, http://www.whoi.edu/oceanus/feature/deep-sea-tubeworms-get-versatile-inside-help

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SCI 115 Week 3 Discussion STR

ACCT 553 DeVry, BIAM 500 DeVry, CIS 500 STR, CIS 558 STR, ENG 105 GCU, FIN 390 DeVry, FIN 504 GCU, HCA 545 GCU, HCA 699 GCU, HLT 306 GCU, HLT 362 GCU, HLT 555 GCU, HLT 610 GCU, HLT 665 GCU, HOSP 594 DeVry, HRM 600 DeVry, MAT 144 GCU, MGMT 600, MGT 599 STR, MGT 655 GCU, MKT 373 GCU, PSY 362 GCU, PSY 565 GCU, PSY 575 GCU, PSY 665 GCU, SOC 102 GCU, SOC 320 GCU, SOC 372 GCU, SOC 412 GCU, NSG 6440 SU, HIM 515 GCU, NSG 4029 SU, HIM 615 GCU, NSG 3029 SU, NSG 4055 SU, NSG 6630 SU, NSG 6005 SU, CRMJ 310, PSY 510 GCU, CRMJ 300 Devry, CRMJ 425, SPD 200 GCU, HLT 490 GCU ,ECH 340 GCU, ECH 440 GCU, ECH 355 GCU, ECH 350 GCU, LDR 461 GCU, ECH 425 GCU, REL 212 STR, ,SCI 115 STR