Evolution- II

Question 1

Genetic basis of adaptation

Answer 1

Lederberg Replica Plating Technique

Question 2

Step 1 of Lederberg Replica Plating Technique

Answer 2

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

Question 3

Step 2 of Lederberg Replica Plating Technique

Answer 3

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

Question 4

Step 3 of Lederberg Replica Plating Technique

Answer 4

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

Question 5

Step 4 of Lederberg Replica Plating Technique

Answer 5

Incubate the plates and allow the bacterial colonies to grow

Question 6

Step 5 of Lederberg Replica Plating Technique

Observation

Answer 6

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

Question 7

Darwinism: Lederberg Replica Plating Technique

Answer 7

Natural selection of mutant variety (Antibiotic resistant variety)

Question 8

Imaginative road to Homo Sapiens

Answer 8

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

Question 9

Dryopithecus

Answer 9

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

Question 10

Ramapithecus

Answer 10

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

Question 11

Australopithecus

Answer 11

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)

Question 12

Oldesnt primitive human evidence

Answer 12

Female fossil of Australopithecus discovered and named Lucy

Found by Raymond Dart

Question 13

Homo Erectus

Answer 13

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

Question 14

Homo Neanderthalensis

Answer 14

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

Question 15

Cro-Magnon man

Answer 15

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