Question
How would you justify that Australopithecus was a human ancestor?
✓
Answer
Australopithecus averaged about $120 \ cm$ tall, and the cranial capacity ranged from $450-600 cm^3$.It had a low forehead, protruding face, lack of chin and low brain capacity. Teeth resembled man because the dental arc was a smoothly rounded parabola, and a simian gap was absent which justifies a human ancestor.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The diagram shows the structure of part of a human placenta.
(i) Name the structures labelled $1-6$.
(ii) What substances diffuse into the placenta and what diffuse out of it?
(iii) What are the functions of placenta?
→(i) Name the structures labelled $1-6$.
(ii) What substances diffuse into the placenta and what diffuse out of it?
(iii) What are the functions of placenta?
Complete the following table by filling in the blank spaces numbered 1 to 8:
| Gland | Secretions | Effect on body |
| (1) ……….. | oestrogen | (2) ……….. |
| Alpha cells of islets of Langerhans | (3) ……….. | (4) ……….. |
| (5) ……….. | (6) ……….. | Protruding eyes |
| (7) ……….. | (8) ……….. | Gigantism |
Given below is a diagram representing a stage during mitotic cell division. Study it carefully and answer the question that follow.
Draw a duplicated chromosome and label its parts.
Draw a duplicated chromosome and label its parts.
Difference between an autotroph and a heterptroph. Give one example of each organism.
A woman with normal vision marries a man with normal vision. They have a colourblind son. Her husband dies and she marries a colourblind man. Show the type of children that might be expected from this marriage and the proportion of each.
Differentiate between the following pair:
Uterus and vegina
Uterus and vegina
The diagram given below represents a structure found in a leaf.
Study the same and answer the questions that follow:
(i) Name the parts labelled as $A$ and $B$.
(ii) What is the biological term for the above structure?
(iii) What is the function of the part labelled A?
→Study the same and answer the questions that follow:
(i) Name the parts labelled as $A$ and $B$.
(ii) What is the biological term for the above structure?
(iii) What is the function of the part labelled A?
Given alongside are the diagrammatic sketches of some endocrine glands. Observe the figures and answer the following questions:
(i) Label the parts numbered 1 to 5.
(ii) Name the hormones secreted by (2) and (5).
(iii) Which chemicals in our body are greatly affected by hormones?
(iv) What is the chemical nature of hormones?
(v) Name the elements related to the functioning of hormones secreted by the structure (2) and (5).
(i) Label the parts numbered 1 to 5.
(ii) Name the hormones secreted by (2) and (5).
(iii) Which chemicals in our body are greatly affected by hormones?
(iv) What is the chemical nature of hormones?
(v) Name the elements related to the functioning of hormones secreted by the structure (2) and (5).
Describe the role of lymph
During a street fight between two individuals, mention the effects on the following organs by the autonomous nervous system, in the table given below : (one has been for you as an example).
| Organ | Sympathetic System | Parasympathetic System |
| e.g. Lungs | Dilates bronchi and bronchioles | Constricts bronchi and bronchioles |
| 1. Heart | ||
| 2. Pupil | ||
| 3. Salivary gland |