Biology 1. If an interphase cell is treated with cyanide (a metabolic poison)‚ the cell does not divide by mitosis. However‚ if cyanide is added right after mitosis has started‚ the same cell completes mitosis. Which of the following explains this observation? A. Metabolic activity ceases during mitosis B. Cell division does not require metabolic activity C. Energy required for mitosis is produced and stored in the cell during interphase D. Mitotic cells make factors that make them resistant to
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UNIT 1 DIVERSITY IN THE LIVING WORLD Chapter 1 The Living World Chapter 2 Biological Classification Chapter 3 Plant Kingdom Chapter 4 Animal Kingdom Biology is the science of life forms and living processes. The living world comprises an amazing diversity of living organisms. Early man could easily perceive the difference between inanimate matter and living organisms. Early man deified some of the inanimate matter (wind‚ sea‚ fire etc.) and some among the animals and plants. A common feature of all
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Chapter 6: Cardiovascular System –– Blood I. Blood: An Overview A. Blood consists of two portions: Formed elements and Plasma. 1. Formed elements Make up 45% of the total volume of whole blood. Contains red blood cells‚ white blood cells‚ and blood platelets. 2. Plasma Makes up 55% of the total volume of whole blood. Contains a variety of inorganic and organic molecules suspended in water. B. Functions 1. Blood is the primary transport medium. a. Delivers oxygen from the lungs and nutrients
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Alanis Vega-Cruz Hip hop Don Campbell Have you ever wonder who made the lock-it move in hip hop? That would be Don Campbell‚ because of his successful creation of the move his name was referred as Don Campbelock. He was creative from his early years as a kid until college was when he discovered hip hop. Then he gets recognition. And how time went by. Don was born in ST Louis‚ during the early years of the 50s‚ but raised in South Central LA. As a kid don enjoyed to draw especially people’s
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Ring Species: A Catalyst for Speciation After spending time on the Galapagos Islands studying the origin of various species‚ former divinest Charles R. Darwin proposed the evolutionary theory of natural selection‚ a mechanism by which advantageous variations in a population are preserved while unfavorable variations are lost (Berkeley‚ 2008). As a result of these variations‚ some individuals are better acclimated to their environment than others. This results in the better-suited individuals outcompeting
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THE CONCEPT OF SPECIES What are species? Species are the basic taxonomic units of biological classification. This grouping of organisms of "like kind" into discrete and stable units has been traced at least from the time of Plato and Aristotle. The term derives from the Latin "specere" (to look at‚ to behold)‚ with the meaning of "kind‚“ "quality‚" "appearance‚" "shape‚" or "a peculiar sort.“ In the past‚ species were classified according to their shape. Carl Linnaeus (1707-1778)‚ the
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A keystone species is a species that has a disproportionate effect on its environment relative to its abundance. Such an organism plays a role in its ecosystem that is analogous to the role of a keystone in an arch. While the keystone feels the least pressure of any of the stones in an arch‚ the arch still collapses without it. Similarly‚ an ecosystem may experience a dramatic shift if a keystone species is removed‚ even though that species was a small part of the ecosystem by measures of biomass
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Invasive Species Threatens the Ecosystem Every life form all over the world depends on the ecosystem for its survival. However‚ the ecosystem can be threatened when there is an excess or drop in resources. Many people will argue that human beings are the primary cause of this economic imbalance‚ but are people the root of this problem? No. There is evidence that many invasive species all over the world has also threatened the ecosystem. All organisms have the potential to become invasive
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Eco/o&y‚ 88(3)‚ 2007‚ pp. 541-549 © 2007 by the Ecological Society of America DIVERSITY AND HOST RANGE OF FOLIAR FUNGAL ENDOPHYTES: ARE TROPICAL LEAVES BIODIVERSITY HOTSPOTS? A. ELIZABETH ARNOLD1 AND F. LUTZONI Department of Biology‚ Duke University‚ Durham‚ North Carolina 27708 USA Abstract. Fungal endophytes are found in asymptomatic photosynthetic tissues of all major lineages of land plants. The ubiquity of these cryptic symbionts is clear‚ but the scale of their diversity‚ host range
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BI 101 Spring 2013 EXAM II This exam covers chapters 4-6. This is an open note & open book exam‚ but all questions should be answered in your own words. Please include the question immediately before each answer‚ and the test is due at the beginning of the lecture following the lecture that completes the discussion of chapter 6. Further notes: On each compare and contrast question‚ 50% of the score will focus how well you ‘compare’ the items (i.e. how the items are similar) and 50% of the
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