I. Describe the structure and function of the nucleus and mitochondria. The mitochondria is a semi-autonomous organelle which reproduces by bynary fission and has its own DNA. Its main function is to produce the energy intermediate ATP‚ through ATP synthase. Mitochondria could be considered a cell inside a cell. It has its own membranes (inner and outer membranes)‚ its ribosomes (to produce the proteins encoded in its DNA)‚ a matrix -- where aerobic respiration occurs. The invaginations of the inner
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Cellular organelle structure and function Nucleus The Nucleus is comprised of the pore perforated nuclear membranes‚ nucleoplasm‚ chromatin and the nucleolus at the core. The nuclear envelope consists of an inner and outer membrane that forms the outer structure. Contained within the nuclear membrane are nucloplasm which is the fluid medium in which the chromatin is present‚ chromatin being the genetic material. At the core of the nucleus is the nucleolus‚ where ribosomes are synthesized. The
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Ecosystem Structure‚ Function‚ and Change Keyich is a city in Casdonia‚ located in Eastern Europe. Over the past six years‚ the city’s population has grown rapidly from 265‚000 in 1995 to 650‚000 in 2001‚ resulting in a 145% increase. The continious fast-paced growth estimates that by 2008 the city’s population is expeted to reach 1‚600‚000. The Keywich City Council has concerns with the excelling growth pattern and possible negative consequences associated with the growth such as cultural‚ economic
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Emma Fried 10/16/11 UH III AP Biology Biology Textbook- Chapter 3-Water and the Fitness of the Environment (pages 41-51) POLAR-The opposite ends of the molecule have opposite charges **attraction between polar molecules **hydrogen bonding orders molecules into structural organization Non-Polar-Substances that are hydrophobic/water fearing. They do not dissolve well and cannot bond. They share electrons perfectly‚ therefore have no difference in charge. Ex: oil‚ gum‚ wax‚ sand‚ plastic
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6.1 Overview of Photosynthesis 6.1.1 Identify the cellular structures where photosynthesis occurs. A: It occurs in plants inside of the chloroplast 6.1.2 Locate the structures within a chloroplast and list their functions. A: A double membrane surrounds a fluid-filled area called the stroma. A third membrane system within the stroma forms flattened stacks called thylakoids‚ which in some places are stacked to from grana. The space within each thylakoid is believed to be connected to the space
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All organisms must have adaptations to survive. The adaptations that organisms develop help them to survive in their environments and then are passed down through reproduction. The genes are passed to future generations and adaptations continue to occur over long periods of time. Nature Works tells us‚” animals that are better adapted to their environment survive and breed. Animals that are not well adapted to an environment may not survive.” There are three types of adaptations that can occur: morphological
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the glomerulus. A good deal of fluid from the blood filters into the capsule. Large proteins and whole blood cells are left behind due to the fact that their too big to pass through the filters along with the plasma or blood fluid. There are four main parts of the nephron tubule: the proximal convoluted tubule‚ the U-shaped loop of Henle‚ the distal convoluted tubule‚ and the collecting duct. A substantial amount of resorption takes place in the proximal convoluted tubule. The small proteins‚ glucose
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The cell membrane is made up of fats‚ proteins‚ lipids‚ and carbohydrates‚ and is a permeable structure. However‚ this permeation is very discerning because it only lets certain things pass through it. The cell membrane has a layer of phospholipids with hydrophobic ends and hydrophilic tops. The “tails” are made out of phosphate‚ while the “heads” are made up of two strings of fatty acids. There are two layers of these phospholipids‚ called the “bilayer”‚ and the tips of each phospholipid are facing
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Feature Structure Function Atria (singular atrium) thin walled no valves rough pectinate muscles sinus node (impulse generating tissue) interatrial septum Right atrium: Receives deoxygenated blood returning to the heart from the vena cava and pumps it to the right ventricle. Left atrium: Receives oxygenated blood returning to the heart from the pulmonary veins and pumps it to the left ventricle. Ventricles thicker walls (than atria)‚ the left is thicker than the right as blood must be pumped all
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1.1 Introduction A forest is a complex ecosystem or assemblage of ecosystems dominated by trees and other woody vegetation. The living parts of a forest include trees‚ shrubs‚ vines‚ grasses and other herbaceous plants‚ mosses‚ algae‚ fungi‚ insects‚ mammals‚ birds‚ reptiles‚ amphibians‚ and microorganisms living on the plants and animals and in the soil and their interaction with one another and with the non-living part of the environment. The type of forest in a given area depends on many elements
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