Allows the organism to become larger and more complex, allows different cells to take on jobs; cell differentiation
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When an organism becomes multi cellular, what does it need systems to have?
The ability to allow communication between every cell, supply every cell with enough nutrients, control exchanges with the environment such as heart and gases.
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What is mitosis?
The process that produces new cells for growth
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What is needed to happen before mitosis?
DNA replication
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What happens during DNA replication?
-The two strands of the DNA molecules 'unzip' to form single strands then new double strands form by DNA bases lining up in complementary pairings.
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What is a diploid cell?
A cell with two copies of each chromosome
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What is the process of mitosis?
All of the chromosomes are copied and each for an 'X' shape. They all line up and spindle fibers pull the pairs apart to each pole of the cell. Then two genetically identical cells are produced.
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What is meiosis?
A process that produces gametes
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What are gametes?
Sex cells
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What type of cells are gametes? Why?
Haploid because they contain only one chromosome from each pair.
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How is the structure of a sperm cell adapted to its function?
It has many mitochondria to provide energy to swim to the egg. It has an acrosome that releases enzymes to digest the egg membrane
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What happens during meiosis?
Single strands are copied to make an X shape, and chromosomes with similar genes pair up. These pairs move to opposite poles of the cell and get seperated. Then the pairs get separated which in total creates 4 new cells.
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Other cards in this set
Card 2
Front
What are the advantages of being multi cellular?
Back
Allows the organism to become larger and more complex, allows different cells to take on jobs; cell differentiation
Card 3
Front
When an organism becomes multi cellular, what does it need systems to have?
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