Life Is Fine
GRADE 12
LIFE SCIENCES (new content framework) Exemplar Assignment: Evolution - evidence MAY 2011
MARKS: 70 TIME: 1 hour 10 minutes
This assignment consists of 10 pages.
Copyright reserved
Please turn over
INSTRUCTIONS AND INFORMATION Read the following instructions carefully before answering the questions. 1. 2. 3. 4. Answer ALL the questions. Write ALL the answers on your ANSWER SHEET. Start EACH question on a NEW page. Number the answers correctly according to the numbering system used in this question paper. If answers are NOT presented according to the instructions of each question, candidates will lose marks. Draw diagrams and flow charts ONLY when requested to do so. The diagrams in this question paper may NOT necessarily be drawn to scale. The use of graph paper is NOT permitted. Non-programmable calculators, protractors and compasses may be used. Write neatly and legibly.
5.
6. 7. 8. 9. 10.
2
EVIDENCE FOR EVOLUTION
1.1
The diagrams below represent the evolution of the horse, compiled from fossil records.
Species of horse
Height
Front leg
Modern horse (Equus) 1,6 m Toe Merychippus 1,0 m Toes
Mesohippus 0,6 m Toes
Hyracotherium 0,4 m Toes
Evolution of the horse compiled from fossil records
3
Life Sciences/Assignment
4 Grade 12/NSC
WCED/Exemplar 2011
1.1.1 Calculate how many times is the modern horse taller than its earliest ancestor? Show your working. 1.1.2 What happened to the appearance of the feet of the horse over time?
(2) (2)
1.1.3 Paleontologists suggest that ancient horses lived in forests, but modern horses live in open grassland. Explain TWO ways in which the modern horse is adapted to open grassland. (4) 1.1.4 Explain ONE way in which the hoof of the modern horse could be a disadvantage in the open grassland environment. (2) 1.1.5 The fossil record is one source of evidence that can be used to explain the theory of evolution. Name TWO other sources that can serve as evidence for evolution. (2) (12) 1.2 Study the
LIFE SCIENCES (new content framework) Exemplar Assignment: Evolution - evidence MAY 2011
MARKS: 70 TIME: 1 hour 10 minutes
This assignment consists of 10 pages.
Copyright reserved
Please turn over
INSTRUCTIONS AND INFORMATION Read the following instructions carefully before answering the questions. 1. 2. 3. 4. Answer ALL the questions. Write ALL the answers on your ANSWER SHEET. Start EACH question on a NEW page. Number the answers correctly according to the numbering system used in this question paper. If answers are NOT presented according to the instructions of each question, candidates will lose marks. Draw diagrams and flow charts ONLY when requested to do so. The diagrams in this question paper may NOT necessarily be drawn to scale. The use of graph paper is NOT permitted. Non-programmable calculators, protractors and compasses may be used. Write neatly and legibly.
5.
6. 7. 8. 9. 10.
2
EVIDENCE FOR EVOLUTION
1.1
The diagrams below represent the evolution of the horse, compiled from fossil records.
Species of horse
Height
Front leg
Modern horse (Equus) 1,6 m Toe Merychippus 1,0 m Toes
Mesohippus 0,6 m Toes
Hyracotherium 0,4 m Toes
Evolution of the horse compiled from fossil records
3
Life Sciences/Assignment
4 Grade 12/NSC
WCED/Exemplar 2011
1.1.1 Calculate how many times is the modern horse taller than its earliest ancestor? Show your working. 1.1.2 What happened to the appearance of the feet of the horse over time?
(2) (2)
1.1.3 Paleontologists suggest that ancient horses lived in forests, but modern horses live in open grassland. Explain TWO ways in which the modern horse is adapted to open grassland. (4) 1.1.4 Explain ONE way in which the hoof of the modern horse could be a disadvantage in the open grassland environment. (2) 1.1.5 The fossil record is one source of evidence that can be used to explain the theory of evolution. Name TWO other sources that can serve as evidence for evolution. (2) (12) 1.2 Study the