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Biology > Evolution- II > Flashcards

Evolution- II Flashcards

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1
Q

Genetic basis of adaptation

A

Lederberg Replica Plating Technique

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2
Q

Step 1 of Lederberg Replica Plating Technique

A
  1. Allow bacterial colonies to grow on a normal nutrient agar medium
  2. Mark the position of the bacterial colonies
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3
Q

Step 2 of Lederberg Replica Plating Technique

A
  1. Press a sterilized velvet cloth with a handle on to the agar plate
  2. Do not change the orientation of the plate
  3. The bacterial colonies get transferred on to the velvet cloth
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4
Q

Step 3 of Lederberg Replica Plating Technique

A

Press the velvet onto
Plate 1: containing normal agar medium
Plate 2: containting agar medium + antibiotic

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5
Q

Step 4 of Lederberg Replica Plating Technique

A

Incubate the plates and allow the bacterial colonies to grow

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6
Q

Step 5 of Lederberg Replica Plating Technique

Observation

A

Plate 1: contained all the bacterial colonies as in master plate
Plate 2: contained only those bacterial colonies that were resistant to antibiotic

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7
Q

Darwinism: Lederberg Replica Plating Technique

A

Natural selection of mutant variety (Antibiotic resistant variety)

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8
Q

Imaginative road to Homo Sapiens

A
  1. Dryopithecus
  2. Ramapithecus
  3. Australopithecus
  4. Homo Habilis
  5. Homo Erectus
  6. Homo Neanderthalensis
  7. Cro-Magnon Man
  8. Modern Homo Sapiens

Daring Rabbits And Happy Elephants Never Cease Hopping- drahench

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9
Q

Dryopithecus

A
  1. Fossil ape
  2. Posture: Semi-erect
  3. Dentition: large canines and 5-cuspid molar
  4. Absence of brow ridges
  5. Frontally broadened jaws
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10
Q

Ramapithecus

A
  1. Posture: almost erect
  2. Dentition: man-like
  3. Small and delicate jaws
  4. Semi circular teeth line
  5. Arched palate
  6. Upright face
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11
Q

Australopithecus

A
  1. Fossil found by Raymond Dart
  2. Posture: almost erect
  3. Dentition: Jaws and teeth like man
  4. Cranial capacity: 600 cc
  5. Low forehead, brow ridges projecting over the eyes
  6. Protruding face and lack of chin
  7. Lumbar curve in the vertebral column and basin like pelvis
  8. Female fossil discovered and named Lucy (oldest primitive human evidence)
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12
Q

Oldesnt primitive human evidence

A

Female fossil of Australopithecus discovered and named Lucy

Found by Raymond Dart

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13
Q

Homo Erectus

A
  1. Height: 155 cm
  2. Cranial capacity: 900 cc
  3. Low forehead
  4. Inconspicuous chin
  5. Large canines
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14
Q

Homo Neanderthalensis

A
  1. Height: 150 cm
  2. Cranial capacity: 1450 cc
  3. Forehead low and sloping
  4. Enlarged nasal cavity
  5. Small canines
  6. Wisdom teeth present
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15
Q

Cro-Magnon man

A
  1. Erect posture
  2. Height: 180 cm
  3. Cranial capactiy: 1660 cc
  4. Vaulted cranium and shorter skull
  5. Reduced jaws
  6. Small canines
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Biology (31 decks)

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