Homo Sapiens

Q.

Humans use 10% of their cerebral capacity. though dollfin use 20% of it..so how come humans are more develpedd than them...?

Q.

Write evolutionary history of modern man.

Q.

Write any two differences between inherited and acquired traits.

Q.

What was the most significant trend, in the evolution of modern man (Homo sapiens), from his ancestors?

1. Increase in brain capacity

2. Upright posture

3. Shortening of jaws

4. Binocular vision

Q. Which of the following in humans are established genetic traits? (Tick-mark the correct ones) in the box provided.

1. Left-handedness
2. Red-green colour blindness
3. Quality of voice
4. Curly hair
5. Capacity to be a good cricketer

Q.

What kind of fishes did humans evolve from?

Q.

Differentiate between the following:

Homo habilis and Homo sapiens

Q.

Write he evolutionary history of the modern

man

Q.

How many years ago and where did Australopithecus existed? Give its four important features.

Q.

The first human like creature found in East African grasslands was known as:

1. Homo habilis

2. Dryopithecus

3. Australopithecines

4. Ramapithecus

Q.

Which of the following represented the first man like ancestor?

1. Homo habilis

2. Australopithecus

3. Cro-Magnon

4. Homo erectus

Q.

Give appropriate terms for the following: (i) Factors that determine traits.

Q.

If you discovered a fossil of a bird with scales on the body and teeth in the beak, what would you conclude about its position in the animal kingdom?

Q. _____ developed a chin for the first time in the history of human evolution.

1. Homo habilis
2. Homo neanderthalensis
3. Homo sapiens
4. Homo erectus

Q.

Give five important features of modern-day humans?

Q. Identify A and B in the given table.

$\begin{array}{cc}\text{Stage of human evolution}& \text{Location of fossil discovery}\\ \text{Homo erectus}& \text{Africa and Asia}\\ \text{(A) \_\_\_\_\_\_\_\_}& \text{Europe and Asia}\\ \text{Homo sapiens}& \text{(B) \_\_\_\_\_\_\_\_\_\_\_}\end{array}$

1. A - Homo neanderthalanesis, B - Asia
2. A - Homo habilis, B - France
3. A - Homo habilis, B - Asia
4. A - Homo neanderthalanesis, B - France

Q.

Name the disorder inherited through the Y-chromosome

Q.

How many alleles of genes for X-linked traits are present in female and male individuals, respectively?

Q. Identify A and B in the given table.

$\begin{array}{cc}\text{Stage of human evolution}& \text{Location of fossil discovery}\\ \text{Homo erectus}& \text{Africa and Asia}\\ \text{(A) \_\_\_\_\_\_\_\_}& \text{Europe and Asia}\\ \text{Homo sapiens}& \text{(B) \_\_\_\_\_\_\_\_\_\_\_}\end{array}$

1. A - Homo habilis, B - Asia
2. A - Homo neanderthalanesis, B - France
3. A - Homo neanderthalanesis, B - Asia
4. A - Homo habilis, B - France

Q.

If a father and son are both defective in red-green colour vision is it likely that the son inherited the trait from his father? Comment.

Q. Cro-Magnon man was

1. Herbivorous
2. Frugivorous
3. Omnivorous
4. Sanguivorous

Q. Very short answer type :
Name the most recent direct prehistoric ancestor of the present man (Homo sapiens sapiens).

Q.

___ developed a chin for the first time in the history of human evolution.

Q. Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles Islands.

1. Sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
2. Sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on
3. Sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of
4. Sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on
5. Sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of

Q.

Fill in the blanks.

Increasing ----------------was the most significant trend in the evolution of modern man.

Q. How did Lamarck explain the inheritance of acquired characters using the example of a giraffe?

Q. What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors?

1. Increasing cranial capacity
2. Upright posture
3. Loss of body hair
4. Binocular vision

Q.

What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors?

1. Increasing brain capacity

2. Upright posture

3. Shortening of jaws

4. Binocular vision