Natural ecosystems Study guides, Class notes & Summaries

What is organic agriculture? correct answer: Organic agriculture is a production system What are the top 3 myths about organic production? Briefly describe each. correct answer: 1. Organic production doesn't use pesticides 2. Organic is healthier 3. Organic farming is better for the environment What percentage of total cropland in Texas is organic certified? In the US? correct answer: 0.5% in Texas 1.5% in US Identify the two main crops discussed in the documentary, what pests th...

LSU ENVS 1126 EXAM 1 LAWS Study Guide Louisiana State University chapter 1 : Over the past 40 years, human well-being has been steadily improving, while natural ecosystems, from which we derive many goods and services, have been declining. Which one of the following does not help to explain this so-called environmentalist's paradox? Select one: a. Food production, a crucial ecosystem service that has been enhanced, outweighs the effects of declines in other ecosystem services b. The mea...

What are the top 3 myths about organic production? Briefly describe each. correct answer: 1. Organic production doesn't use pesticides 2. Organic is healthier 3. Organic farming is better for the environment Organic production doesn't use pesticides correct answer: "Organic" doesn't mean non-toxic or safe. There are other pathogens associated with organic production. Organic is healthier correct answer: Not backed by scientific data. No evidence for any differences in content of ...

Question 1 Correct 1.00 points out of 1.00 Flag question Question text In an ecosystem, energy Select one: a. comes ultimately from bacteria b. cycles along with chemical nutrients c. typically flows from producers through a series of consumers d. typically flows from consumers to producers to decomposers Question 2 Correct 1.00 points out of 1.00 Flag question Question text Life is organized in a hierarchical fashion. Which of the following sequences correctly lists that hierarchy from least in...

Historically what has been the typical response of people to any natural disturbance? By ignoring major disturbances that occur over longer time scales, how was land management for timber, conservation and endangered species management impacted? Realistically, can humans manage large scale natural disturbances? - Historically the response has been to try and control or mitigate the effects of natural disturbance. Land management is impacted positively when ignoring major disturbances as they...

Define Ecology correct answer: -Science dealing with the mutual relationships among biological organisms. What are the components of an ecosystem? correct answer: -Food chains -Nutrient Cycles -Plant Succession -Competitive Exclusion -Diversity What are agroecosystems, and how do they differ from ecosystems? correct answer: -Ecosystems modified to produce food, fiber and shelter -Examination of natural ecosystems to determine more sustainable approaches Describe the differences...

ENV 201 final exam questions & answers 2023/2024 Environment - ANSWER-The biological and physical surroundings in which any given living organism exists. Environmental Science - ANSWER-An interdisciplinary field of research that draws on the natural and social sciences and the humanities in order to understand the natural world and our relationship to it Empirical Science - ANSWER-a scientific approach that investigates the natural world through systematic observation and experimentat...

identify the two main crops discussed in the documentary, what pest threatened them, and where they were grown. correct answer: Papaya- ringspot virus, Hawaii Banana- Banana Wilt(bacteria), Uganda Match the primary individuals featured in the documentary to their qualifications/associations and their position on GMOs. correct answer: Jeffery smith - no training, against Margaret Wille- Hawaii city council member, M. Education, against Brenda Ford- former biology major Define ecosyste...

Biodiversity is measurable at three levels: - ANSWER Genetic level= variability within species Species level= variability among species Ecosystem level= variability among ecosystems Three domains of life: - ANSWER Archaea, eukarya and bacteria Population - ANSWER interbreeding group of individuals. Populations exchange genes Purpose variability within a population - ANSWER 1. some genetic variants have advantages over others 2. natural selection can act on variation What if popula...

Which domain(s) consist(s) of prokaryotic cells? correct answers Bacteria and Archaea A hypothesis is a(n) ________. correct answers tentative answer to a question Which of the following is NOT recycled but is lost from ecosystems? correct answers energy What is biology? correct answers the scientific study of life Science is ________. correct answers the inquiry-based effort to describe and explain nature You try to start your car, but it does not start. Which of these is a predi...