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Life Science: Genes & Molecular Machines (Types of Cells (Eukaryotic…
Life Science: Genes & Molecular Machines
Types of Cells
Eukaryotic
Membrane-Bound nucleus
Multi or single celled
genetic material in nucleus
Prokaryotic
No nucleus
always unicellular
genetic material free-floating
Heredity
Phenotype
Physical appearance
determined from genotype
similar to parents but not the same
Genotype
Genetic makeup
made from combination of each parents 23 chromeosomes
similar to parents but not the same
Cell Division
Meiosis
Reproduction of Sex Cells
Produces 4 daughter cells
results in 23 chromosomes in each daughter cell
Mitosis
Reproduction of body cells
Produces 2 daughter cells
results in 46 chromosomes in each daughter cell
Flowering Plants & Seeds
Seed Dispersal
seeds can be dispersed through many ways. By water, wind, mechanical propulsion, or by animal.
The seeds must get far away from the parent plant so as not to take all the nutrients from the parent plant, or so it can grow without losing nutrients.
Pollination
Plants attract pollinators in many ways and they get the traits that attract pollinators through mutations, so the plants that better reproduce pass on the trait
Plants can cross or self pollinate. The self pollination works when the pollen falls from the anther to the pistil of the flower.