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Published byMarlene Carpenter Modified over 9 years ago
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CELL REPRODUCTION
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WHY DO CELLS DIVIDE? TO CREATE NEW CELLS TO REPLACE DEAD CELLS TO ALLOW GROWTH TO REPAIR DAMAGED OR INJURED CELLS
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WHY MUST CELLS BE SMALL? CELLS CAN ONLY METABOLIZE AS THEY RECEIVE MATERIALS DIFFUSION IS SLOW AND INEFFICIENT OVER LONG DISTANCES, SO CELLS MUST BE SMALL
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VOLUME INCREASES MUCH FASTER THAN SURFACE AREA SMALL SURFACE AREA CANNOT EFFICIENTLY TAKE IN OR REMOVE MATERIALS FROM A LARGE VOLUME.
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CELL IS POISONED OR STARVES
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2 TYPES OF REPRODUCTION ASEXUAL REPRODUCTION SEXUAL REPRODUCTION
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ASEXUAL REPRODUCTION PRODUCING OFFSPRING FROM ONE PARENT PRODUCE AN EXACT COPY OF THE PARENT BECAUSE THE GENES ARE THE SAME
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BINARY FISSION PRODUCTION OF 2 CELLS OF THE SAME SIZE. EXAMPLES: BACTERIA, ALGAE & PROTOZOA
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SPORE FORMATION TINY ASEXUAL REPRODUCTIVE CELLS WITH A HARD OUTER WALL– DEVELOPS INTO A NEW ORGANISM EX: FUNGUS
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BUDDING A SMALL BUD GROWS DIRECTLY FROM THE BODY OF THE PARENT AND LATER SEPARATES.
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Brown hydra - Hydra oligactis - video 09.html - ARKive Brown hydra - Hydra oligactis - video 09.html - ARKive
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VEGETATIVE PROPAGATION SMALL PLANTS FORM FROM ROOTS, STEMS, OR LEAVES OF OTHER PLANTS. EXAMPLES: STRAWBERRIES, POTATO & SPIDER PLANT
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REGENERATION DEVELOPMENT OF A NEW ANIMAL FROM PART OF ANOTHER. STARFISH & JELLYFISH
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SEXUAL REPRODUCTION TWO PARENTS PRODUCE OFFSPRING EACH CONTRIBUTES GENES (TRAITS) TO THE OFFSPRING
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GAMETES – SEX CELLS FEMALE GAMETE + MALE GAMETE EGG CELLSPERM CHROMOSOME # 23 FERTILIZED EGG (ZYGOTE) CHROMOSOME # = 46 FERTILIZATION – IS THE PROCESS WHERE EGG & SPERM COMBINE TO FORM A ZYGOTE
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