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Biodiversity of Life

 

            Question: Considering biology, how can something be alive?.
            
             - Cell Theory: Must have at least one i.: Uni-Cellular, Multi-Cellular; Cells come from other Pre-existing Cells. Nothing .
             can come from nothing. .
             - Properties of life Respond to Environment: ability to sense their internal and external environment. .
             - Properties of life Grow and Reproduce: Grow: can get bigger, increase number of cells, etc. Reproduce: either asexual or sexual. * .
             - Everything has Genetic Material that can be passed on.
             - Properties of life Obtain and use Energy.
             - Properties of Life Maintain Physiologically. .
             - Properties of Life-Adapt .
             Levels of Organization.
             Atoms: Molecules - Cells = the basic unit of life.
             Question: What are cells made of? .
             A: Carbon, Hydrogen, Nitrogen, Phosphorus, Oxygen, S?.
             Organism Level.
             Tissues > Organs > Organ Systems > Organism.
             Population Level.
             Individual > Population > Community > Ecosystem > Biosphere.
             Sequence of amino acids in each protein determines the shape:.
             Different shapes = different functions.
             Why are proteins important?.
             Proteins are critical to structure and metabolism of all living organisms. .
             Enzymes: Accelerate biochemical reactions.
             Structural: Form biological structures.
             Transport: Carry biochemically important substances.
             Defense: Protect the body from foreign invaders. .
             Heredity - How genes are passed from one generation to the next.
             Chromosomes are passed from parents to offspring in the egg and sperm (gametes).
             23 pairs - 46 total.
             (22 are numbered) #23 is either X (Male) Y (Female).
             Gametes are produced during the process of meiosis.
             Diploid (Parent): Two sets of chromosomes > Meiosis > Haploid (Gametes): one set of chromosomes > Fertilization > .
             Diploid (Zygote): Two sets of chromosomes.
             Sperm and eggs contain 1/2 the "Normal " amount of DNA.
             Objective Questions.
             What is a gene?.
             How do genes control traits?.
             how are genes passed from one generation to the next?.
             Objectives.


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