Biology an der Hochschule Rhein-Waal | Karteikarten & Zusammenfassungen

Lernmaterialien für Biology an der Hochschule Rhein-Waal

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What are the three primary tissues in a plant stem?

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  1. dermal (epidermis)
  2. ground (pith & corlex in shoots & roots)
  3. vascular (xylem & phloem)

--> Meristematic tissue

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Important parts in a plant root:

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  • root epidermis cells= absorb water & minerals in it
  • cortex cells= move water from epidermis to vascular tissue & store food
  • vascular tissue= (xylem & phloem) conduct nutrients & water
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Name some functions of membrane proteins:

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  • transport (hydrophilic channel or changing shape)
  • enzymatic activity (active side exposed to substances in adjacent solution --> team carries out sequential steps)
  • signal transduction (binding side with shape that fits shape of chemical messenger e.g. hormone --> relays message to cell inside)
  • cell-cell recognition (binding +glycoproteins, short-lived)
  • intercellular binding (in various forms, long-lasting)
  • attachment to structural fibers (+cytoskeleton --> maintains cell shape & stabilizes location of mp)
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What is Cytoplasm & what does it do?

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  • gel-like, colorless substance (80% water) in eukaryotik cells
  • surrounds nucleus
  • supports internal structure, maintains shape
  • stores chemicals vital to plants
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Explain: Ground tissue

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  • mostly made up of parenchyma cells, may also contain collenchyma and sclerenchyma cells that help support the stem
  • Pith = owards the interior of the vascular tissue in a stem or root
  • Cortex= between the vascular tissue and the epidermis
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What is a Meristem?

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tissue consisting of undifferentiated (meristematic) cells found in zones of the plants where growth takes place

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Explain the differences between a animal cell & a plant cell


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Plant cell:

-has cell walls

-plastids occur in cytoplasm

-Large vacuoles filled with liquid


Animal cells:

-no cell wall, cell membrane outside

-no plastids

- small vacuoles (if present) and contractile or temporary vesicles


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What is cellulose?

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Formula = 


-main substance that makes up the cell walls & fibers of plants


(most frequent organic material on earth)

-is synthesized in plasma membrane & polymerizes to large structures (fibers)

-soluble in strong acids (not water)

-Humans have no enzymes to digest cellulose, but animals e.g cattle

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Which of the following are prokaryotes?

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Archaea and bacteria

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Name the functions of the cell/plasma membrane:

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  • controls movement of substances in & out of cells
  • small molecules move across the membrane by diffusion
  • transport of ions & larger molecules : plasmodesmata, proteins, encapsulation
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Explain: Dermal tissue (epidermis)

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  • singe layer of cells, that covers leaves, flowers, root, stem of plants
  • boundary between plant & external environment
  • Primary & Secondary (bark of wood)
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What are the growth zones in a plant called?

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  • Shoot apical meristem: gives rise to organs like leaves & flowers
  • Root apical meristem: gives rise to roots
  • Cambium: thickening of woody plants


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  • 3 Lernmaterialien

Beispielhafte Karteikarten für deinen Biology Kurs an der Hochschule Rhein-Waal - von Kommilitonen auf StudySmarter erstellt!

Q:

What are the three primary tissues in a plant stem?

A:
  1. dermal (epidermis)
  2. ground (pith & corlex in shoots & roots)
  3. vascular (xylem & phloem)

--> Meristematic tissue

Q:

Important parts in a plant root:

A:
  • root epidermis cells= absorb water & minerals in it
  • cortex cells= move water from epidermis to vascular tissue & store food
  • vascular tissue= (xylem & phloem) conduct nutrients & water
Q:

Name some functions of membrane proteins:

A:
  • transport (hydrophilic channel or changing shape)
  • enzymatic activity (active side exposed to substances in adjacent solution --> team carries out sequential steps)
  • signal transduction (binding side with shape that fits shape of chemical messenger e.g. hormone --> relays message to cell inside)
  • cell-cell recognition (binding +glycoproteins, short-lived)
  • intercellular binding (in various forms, long-lasting)
  • attachment to structural fibers (+cytoskeleton --> maintains cell shape & stabilizes location of mp)
Q:

What is Cytoplasm & what does it do?

A:
  • gel-like, colorless substance (80% water) in eukaryotik cells
  • surrounds nucleus
  • supports internal structure, maintains shape
  • stores chemicals vital to plants
Q:

Explain: Ground tissue

A:
  • mostly made up of parenchyma cells, may also contain collenchyma and sclerenchyma cells that help support the stem
  • Pith = owards the interior of the vascular tissue in a stem or root
  • Cortex= between the vascular tissue and the epidermis
Mehr Karteikarten anzeigen
Q:

What is a Meristem?

A:

tissue consisting of undifferentiated (meristematic) cells found in zones of the plants where growth takes place

Q:

Explain the differences between a animal cell & a plant cell


A:

Plant cell:

-has cell walls

-plastids occur in cytoplasm

-Large vacuoles filled with liquid


Animal cells:

-no cell wall, cell membrane outside

-no plastids

- small vacuoles (if present) and contractile or temporary vesicles


Q:

What is cellulose?

A:

Formula = 


-main substance that makes up the cell walls & fibers of plants


(most frequent organic material on earth)

-is synthesized in plasma membrane & polymerizes to large structures (fibers)

-soluble in strong acids (not water)

-Humans have no enzymes to digest cellulose, but animals e.g cattle

Q:

Which of the following are prokaryotes?

A:

Archaea and bacteria

Q:

Name the functions of the cell/plasma membrane:

A:
  • controls movement of substances in & out of cells
  • small molecules move across the membrane by diffusion
  • transport of ions & larger molecules : plasmodesmata, proteins, encapsulation
Q:

Explain: Dermal tissue (epidermis)

A:
  • singe layer of cells, that covers leaves, flowers, root, stem of plants
  • boundary between plant & external environment
  • Primary & Secondary (bark of wood)
Q:

What are the growth zones in a plant called?

A:
  • Shoot apical meristem: gives rise to organs like leaves & flowers
  • Root apical meristem: gives rise to roots
  • Cambium: thickening of woody plants


Biology

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