BY_124_1_12_16_Notes_PDF.pdf BY 124
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This 2 page Class Notes was uploaded by Heidi Mikell on Thursday April 21, 2016. The Class Notes belongs to BY 124 at University of Alabama at Birmingham taught by Dr. Cusic in Spring 2016. Since its upload, it has received 4 views. For similar materials see Biology in Biology at University of Alabama at Birmingham.
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Date Created: 04/21/16
BY 124 Dr. Cusic 1/12/16 Exam I 1. Plant cell overview a. Eukaryotic b. Multicellular c. Autotrophic (make their own food through photosynthesis) d. Contain chlorophylls A (main one), B (gives green color), e. Contain carotenoids (red/orange that appear in autumn) f. Store glucose as starch g. Cell walls made of the complex carbohydrate Cellulose h. Have a large central vacuole for storage i. Communicate using plasmodesmata 2. Land plants a. Evolved around 500 million years ago b. Evolved from charophytes i. Charophytes are a type of green algae c. Ancestral algae i. Red algae ii. Chlorophytes iii. Charophytes iv. Embryophytes d. Algae and Charophyte Similarites i. Both have circular rings of cellulose synthesizing protein ii. Flagellated sperm (not in all land plants though) iii. Formation of phragmoplasts 1. Phragmoplasts are microtubules that aid in forming the cell plate iv. Have a sporopollenin polymer 1. Useful when in organism is in danger of drying out e. Differences in charophytes and plants i. Apical Meristems 1. These are undifferentiated tissues used for growth ii. Alternation of generations 1. Diploid (2n) sporophyte undergoes meiosis to produce haploid (n) spores that become a haploid (n) gametophyte. The gametophyte undergoes mitosis to produce haploid (n) gametes which fertilize and grow into a diploid (2n) sporophyte. 2. A spore is a cell that will grow by mitosis into a multicellular organism without fusing with another cell a. Spores produce haploid (n) gametophytes. iii. Wallspores in the sporangium 1. Act as a protective cover to prevent drying out iv. Multicellular gametangia 1. Archegonium makes eggs 2. Antheridium makes sperm v. Multicellular dependent embryos 1. Contained in archegonium 2. Have placenta transfer cells for nutrients
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