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What are Darwin 3 theories on evolution?
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there is a struggle for existence
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there is variation between individuals of the same species
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that individual characteristics are heritable
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that individual characteristics aren't heritable
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there is variation of individuals in differing species
Frage 2
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Anabolic reactions are reactions that break down molecules
Frage 3
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Anabolic reactions build molecules
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Prokaryotes have a [blank_start]simple[blank_end] structure, they have [blank_start]no nuclear membrane[blank_end] but have a [blank_start]cell wall[blank_end]. Their DNA is also [blank_start]not seperated[blank_end].
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simple
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complex
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no nuclear membrane
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a nuclear membrane
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cell wall
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cell membrane
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not seperated
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separated
Frage 5
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Totipotent means the cell can become specialised
Frage 6
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What is light microscopy?
Frage 7
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What are the limitations of light microscopy?
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wavelength of natural light
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wavelength of light
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can only use thin layers of cells
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can only see certain organelles
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can't be used for certain tissue samples
Frage 8
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What type of stains can be used for histochemistry
Frage 9
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The differences between gram positive and negative is that gram positive [blank_start]resists[blank_end] purple stains and has [blank_start]thick[blank_end] peptidoglycan whereas gram negative has [blank_start]thin[blank_end] peptidoglycan and [blank_start]absorbs[blank_end] the purple colour
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resists
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thick
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thin
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absorbs
Frage 10
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The process of immunolabelling
[blank_start]Unlabelled[blank_end] antibody [blank_start]binds[blank_end] to antigen then a secondary labelled [blank_start]antibody[blank_end] binds to the primary antibody and [blank_start]emits light[blank_end] as a marker
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binds
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Unlabelled
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antibody
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emits light
Frage 11
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Two bacterial specialisations are [blank_start]pili[blank_end] and [blank_start]flagella[blank_end]. [blank_start]Pili[blank_end] is for adhesion and [blank_start]flagella[blank_end] is for movement
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pili
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flagella
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Pili
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flagella
Frage 12
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Protists are [blank_start]unicellular[blank_end] organisms such as [blank_start]algae[blank_end] or amoeba
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unicellular
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multicellular
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algae
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sponges
Frage 13
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Structure and function of fungi
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have rigid cell walls
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have no cell wall
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have a cell membrane
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made of microscopic filaments
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are heterotrophs absobers
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create molecules using enzymes
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break down molceules using enzymes so they can be absorbed
Frage 14
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3 types of plant tissues
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ground tissue
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vascular tissue
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Dermal tissue
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stem tissue
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root tissue
Frage 15
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Ground tissue is for [blank_start]support[blank_end] and [blank_start]energy storage[blank_end], vascular tissue is for [blank_start]transport of water and nutrients[blank_end] and dermal tissue is for [blank_start]protection[blank_end]
Frage 16
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Epithelial cells are [blank_start]tightly packed[blank_end] cells which are [blank_start]specialised[blank_end]. They form a barrier and have [blank_start]absorbant[blank_end] properties and can facilitate absorbtion by [blank_start]microvilli[blank_end]
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tightly packed
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specialised
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absorbant
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microvilli
Frage 17
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The two types of connective tissues are [blank_start]fibroblasts[blank_end] which are for [blank_start]support[blank_end] and secretion and [blank_start]leukocytes[blank_end] which are for [blank_start]defense[blank_end]
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fibroblasts
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support
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leukocytes
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defense
Frage 18
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What are the intermediate filaments function?
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to provide cell strength
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to provide support
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to provide protection
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to provide defense
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to provide nutrients
Frage 19
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What processes occur in the nucleus?
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DNA replication
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DNA transcription
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RNA transcription
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RNA translation
Frage 20
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What occurs when a large nucleolus or multiple nucleoli is present
Frage 21
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When DNA is highly condensed it is undergoing mitotic division
Frage 22
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What is the role of lamins?
Frage 23
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What are nuclear pores ?
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small channels for diffusion of water soluble molecules
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large molecules for water soluble molecules
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small channels for ion transport
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small channels to allow for small molecules to pass
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large channels for protein transportation
Frage 24
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Facts about ribosomes
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they occur freely in the cell
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they occur attached to the rough ER
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they occur attached to smooth ER
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free ribosomes synthesise cytosolic proteins
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free ribsomes synthesise mitochondria
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attached ribosomes synthesise chloroplasts
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free ribosomes synthesise chloroplasts and peroxisomes
Frage 25
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The first stage of mitotic division is [blank_start]prophase[blank_end] the second is [blank_start]metaphase[blank_end] the third is [blank_start]anaphase[blank_end] the fourth is [blank_start]telophase[blank_end] and then undergoes [blank_start]cytokenesis[blank_end]
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prophase
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metaphase
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anaphase
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telophase
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cytokenesis
Frage 26
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DNA replication requires a [blank_start]replication[blank_end] complex in order to bind to the replication [blank_start]start site[blank_end]. The complex contains [blank_start]DNA polymerase[blank_end] which assembles [blank_start]nucleotides[blank_end] into DNA strands. The replication has many start points to [blank_start]speed up[blank_end] replication time.
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replication
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translation
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start site
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end site
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DNA polymerase
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DNA helicases
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nucleotides
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codons
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speed up
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slow down