M1 L1 diversity of life Flashcards

• Outline the characteristics that define life. • Outline the scale of life. • Outline the requirements of natural selection in shaping life. • Outline the tree of life, how we know what it looks like and key features including endosymbiosis. • Outline what a phylogenetic tree represents. • List the three domains of life.

1
Q

chracteristics of life

A
cellular organization (how the cell is organized)
reproduction
metabolism
homeostasis
heredity
Response to stimuli
Growth and development
Adaptation through evolution
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2
Q

sizes of cells and organell

A

Animal and plants 10-100 um
bacteria cells 1-5um

organells

  • mitochondria 1-10um
  • chloroplast 2-5um

prats of cell

  • lipids 1-5um
  • protein 5-10um
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3
Q

what is Natural Selection?

A

The process through which populations of living organisms adapt and change.

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4
Q

Requirements for natural selection.

A

Variation - individuals in a population varies from one another
inheritance - parents pass on their traits to their offspring
selection - some variation reproduce more then others
time - successful generation accumilate over many generations.

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5
Q

Parakaryote

A
  • made of cells that lack nucleus and any membrane-bound organelles.
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6
Q

eukaryote

A
  • made of cells that contain membrance bound organells and nucleus.
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7
Q

3 main domains

A

Bacteria
archea
Eukarya

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8
Q

Prokaryotes (name domains)

A

Bacteria

archea

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9
Q

Eukaryotes (name domain)

A

Eukaryotes (4 kingdoms)

  • plantae
  • fungi
  • animalia
  • protista
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10
Q

Endosymbiot theory

A

states that the mitochondria and chloroplast in eukaryotic cells were once aerobic bacteria (prokaryote) that were ingested by a large anaerobic bacteria (prokaryote)

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11
Q

which bacteria were mitochondria and cloroplast derived from?

A

proteobacteria - mitochondria

cyanobacteria - chloroplasts

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