GYMNOSPERMS - phlya Ginkgophyta‚ Gnetophyta‚ Cycadophyta and Coniferophyta - vascular plants with true roots - gymnosperms = “naked seeds” - cones/strobili - have seeds that develop on the surfaces of sporophylls instead of in ovaries like angiosperms - microsporangium produces pollen grains (sperm) and the megasporangium produces the egg - sporophyte generation is dominant - no water needed for fertilization – pollen travels with the wind Pine trees
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Write your name here Surname Other names Centre Number Candidate Number Edexcel GCE Biology Advanced Subsidiary Unit 4: The Natural Environment and Species Survival Wednesday 16 June 2010 – Morning Time: 1 hour 30 minutes You do not need any other materials. Paper Reference 6BI04/01 Total Marks Instructions black ink or • Usein the boxesball-point pen. page with your name‚ at the top of this • Fill number and candidate number. centre • Answer all questions. in the spaces
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distinction among groups of organisms. Eukaryotic cells contain membrane-bound organelles‚ such as the nucleus‚ while prokaryotic cells do not. Differences in cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts‚ the cell wall‚ and the structure of chromosomal DNA. Prokaryotes were the only form of life on Earth for millions of years until more complicated eukaryotic cells came into being through the process of evolution. Prokaryotes also differ
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are not plants‚ animals‚ or fungi. The sexual cycles of many Protista are unknown‚ but most are thought to have some process of genetic recombination. Unicellular Protista can feed on other organisms in the manner of an animal‚ but it also has chloroplast and can perform photosynthesis
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INVESTIGATE A FACTOR AFFECTING THE RATE OF PHOTOSYNTHESIS. Introduction Photosynthesis is a chemical reaction which takes place inside the green plants (plants with chlorophyll‚ a pigment found in chloroplasts which causes the colour of the plants and it is the main photosynthetic pigment) and light energy is converted into chemical energy. Carbon dioxide‚ water and sunlight is transformed into sugar an oxygen‚ which later will be used as energy for the plant. The chemical equation of photosynthesis
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<b>Scientific name</b> -Kingdom- Fungi‚ Phylum- Ascomycota Class- Ascomycetes Order- Saccharomycetaler‚ Family- Saccharomycetaceae‚ Genus- Saccharomyces‚ Species- Cervisiae<br><br><b>Description</b> - Yeast is a unicellular organism that lacks chloroplasts. They are so small that it can ’t be seen by the naked eye and they are so small that it would take 4000 of them lined up side by side to measure an inch. <br><br><b>Habitat</b> - Yeast lives on and is nourished by dead or living plant or animal
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storing energy. Aim We are trying to find proof‚ to demonstrate the necessity of light and chlorophyll in the process of photosynthesis. Background Photosynthesis occurs in organisms which contain chlorophyll. It’s a process that involves the chloroplasts to synthesize glucose molecules from carbon dioxide and water. Energy (ATP)‚ initially in the form of glucose (monosaccharide) is later formed by condensation reaction into starch (polysaccharide). These alpha-glucose units are attached together
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Preliminary Biology 2015 Assessment FOR Learning (AFL2) (this is NOT for a mark‚ but for practice) PART A: MULTIPLE CHOICE/SHORT ANSWER 10 Marks Mark Answers on this page 1. Which of the following is the general equation for aerobic cellular respiration? A. green plant plant eater meat eater B. water + carbon dioxide glucose + oxygen C. Glucose + oxygen carbon dioxide + water D. Carbon + oxygen carbon dioxide + water (plus energy) 2. Why are decomposers so
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What Is So Important About Cells? Cells are the most basic building block of all life as we know it. But what makes cells extremely important to living organisms‚ and why do we need cells anyway? A cell is “a usually microscopic structure containing nuclear and cytoplasmic material enclosed by a semipermeable membrane and‚ in plants‚ a cell wall; the basic structural unit of all organisms.” But what makes cells extremely important to living organisms‚ and why do we need cells anyway? Cells are
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Autumn Leaves Trees have green leaves due to the abundance of chlorophyll and chloroplasts in leaves. These organelles absorb‚ store and convert light energy from the sun and is necessary photosynthesis to occur. These organelles reflect green light which attributes to the green color of leaves. The leaves change color in the fall and winter do to the shortened times of daylight and lower temperatures. Trees also divert nutrients from leaves to store in twigs and branches for preparation of winter
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