following possible points (structure) Distant object Close object Cornea suspensory ligament Ciliary Body - in tension - relaxed; - converges light/refracts/bends light; - tension relaxed; - contracts; - pulled thin; Lens - allowed to become fatter/more spherical; - the more convex/fatter the lens‚ the shorter focal length (or converse) Each itemised point in a box (-) worth one mark. Any 6 from 8 points. (b) (i) (ii) (c) (d) only blue-(sensitive) cones/cells stimulated; (mixture of)
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Eukaryotic Cells Worksheet Provide a list describing at least three differences between prokaryotic and eukaryotic cells: 1. While Prokaryotes contain just one copy of each gene‚ eukaryotic cells have two. For such reason‚ prokaryotes are known as haploid and eukaryotic as diploid. 2. While Prokaryotes see some nonessential genes being encoded into extra-chromosomal plasmids‚ such activity is typically absent in Eukaryotic cells. 3. The own way DNA is present in each type of cell has different
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SCIENCE CELL – STRUCTURE AND FUNCTIONS Cell – Structure and Functions Cell as the Basic Unit of Life The cell is the basic structural and functional unit of all living organisms. It is the smallest part of the body of an organism‚ is capable of independent existence and is able to perform the essential functions of life. Discovery of the Cell Robert Hooke observed cork cells under a simple microscope designed by him. He observed compartments resembling honeycombs and each compartment
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How is the structure of cells related to their function? Cell structures come in various shapes and sizes dependent on their location within an organism and what life sustaining process it carries out. These can range from the globular protein of a red blood cell‚ designed to carry four oxygen molecules at a time to the tail like flagellum of a bacteria designed for mobility and penetration of organs within a body. There are two main types of cells‚ eukaryotic cells which are generally plant
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Micrograph Structure (noun) Function (verb) Relationship between S/F Nucleus - Nucleus composed of chromatin‚ nucleoplasm‚ a nucleolus‚ and a nuclear envelope - Has large pores (nuclear pores/nuclear envelope) - Nuclear envelope has a double membrane - Diameter of 5 micrometers - spherical shape - controls all cell activity by directing which enzymes are made for specific functions - stores the genetic material of the cell (DNA) - directs the chemical reactions in cells by transcribing
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Organelle | Found In | Structure | Function | Cell Membrane (plasma membrane) | Both | A phospholipid bilayer that contains proteins. Lipids face each other while the phosphates face away from each other. Most proteins stay with the outer layer of phospholipids. | Protective barrier. Transports required materials and wastes in and out of the cell. Cell communication. | Nucleus | Both | Dense sphere inside the cell. Surrounded by a nuclear envelope with nuclear pores that allow for material transportation
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ESSAY ‘The structure and importance of the plasma membrane found within and around all cells’ The plasma membrane surrounds all eukaryotic and prokaryotic cells. Eukaryotic cells have membrane bounded organelles whereas prokaryotic cells do not. The plasma membrane forms the boundary between the cell cytoplasm and the environment. Its function are to allow different environments to be established inside and outside the cell. It also controls the movement of substances into and out of the cell. The cell
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Chapter 3 Cloze Notes CORNELL NOTES UNIT 2: Cells Directions: Create a Chapter 3: Cell Structure and Function minimum of 5 questions in this column per page I. Cell Theory (Section 3.1) (average). You can use these questions during class A. Early studies led to the development of the cell theory or tutorial to better understand a topic; or at home to better understand 1. Discovery of Cells your notes and prepare for tests and quizzes. a. Robert __________ (1665)—Used compound microscope to
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Brain Structures and Functions Worksheet PSY/340 Version 3 1 University of Phoenix Material Brain Structures and Functions Worksheet Provide a brief description for each of the following functions: 1. Basal ganglia Controls cognition‚ movement coordination‚ and voluntary movement. 2. Corpus collosum Thick band of nerve fibers that connects the two hemispheres of the brain. 3. Temporal lobe The lobe involved in hearing‚ language comprehension‚ and memory. 4. Occipital
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Brain Structure and Function Worksheet PSY 340 Brain Structure and Function Worksheet 1. Basal ganglia: This area consists of three clusters of neurons (these are called globus pallidus‚ caudate nucleus‚ and putamen). These are situated at the bottom of the brain that accounts for the involuntary movements like tremors. 2. Corpus collosum: This thick band of nerve fibers connects both of the brains hemispheres. 3. Temporal lobe: The two sides of the brain that is located on the sides
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