The primates that probably lived in East Africa grasslands about two mya were:
Show Hint
- Dryopithecus
- Ramapithecus
- Australopithecines
- Neanderthal
The Correct Option is C
Solution and Explanation
Top Questions on evolution
- How does the process of Natural Selection affect Hardy-Weinberg equilibrium? Explain with the help of graphs.
- Assertion (A): The number of white winged moths decreased after industrialisation in England.
Reason (R): Effects of industrialisation were more marked in rural areas of England. - Which one of the following options shows the correct evolutionary order of the plants mentioned below?
(i) Ferns (ii) Ginkgo (iii) Zosterophyllum (iv) Gnetales
Choose the correct option. - The first human-like hominid evolved during human evolution is supposed to be:
Read the following passage and answer the questions that follow.
The most convincing evidence to trace evolutionary relationships between humans and different groups of animals come from the basic similarities seen at the molecular level. Study the table given below that depicts the number of amino acid differences between the haemoglobin polypeptide of a few animals with that of humans and answer the questions that follow.
S.No. Animal No. of amino acid differences in haemoglobin with that of humans 1. Macaque 08 2. Dog 32 3. Bird 45 4. Frog 67 5. Lamprey 125 (a) To which category of evolution (Divergent or Convergent) do the following evolutionary relationships belong to:
(i) Humans and Macaque
(ii) Humans and Frog
(b) What do the biochemical similarities in haemoglobin suggest about the evolutionary relationship between humans, frog, and lamprey?
(c) (i) Which one of the two – lampreys’ or macaques’ evolution is more closely related to humans and why?
OR
(c) (ii) Which one of the two – frogs’ or dogs’ evolution is more closely related to humans and why?
Questions Asked in CBSE CLASS XII exam
- Why ammonolysis of alkyl halides is not a good method to prepare pure amines?
Bittu and Chintu were partners in a firm sharing profit and losses in the ratio of 4:3. Their Balance Sheet as at 31st March, 2024 was as
On $1^{\text {st }}$ April, 2024, Diya was admitted in the firm for $\frac{1}{7}$ share in the profits on the following terms:
- New profit sharing ratio between Bittoo, Chintoo and Diya will be $3:3:1$.
- Fixed Assets were found to be overvalued by ₹ 1,40,000.
- Creditors were paid ₹ 4,20,000 in full settlement.
- Diya brought proportionate capital and ₹ 5,60,000 as her share of goodwill premium by cheque.
Prepare Revaluation Account and Partners' Capital Accounts.
- CBSE CLASS XII - 2025
- Profit and Loss Account
- A battery of emf \( E \) and internal resistance \( r \) is connected to a rheostat. When a current of 2A is drawn from the battery, the potential difference across the rheostat is 5V. The potential difference becomes 4V when a current of 4A is drawn from the battery. Calculate the value of \( E \) and \( r \).
- CBSE CLASS XII - 2025
- Current electricity
- Calculate the value of the current passing through the battery in the given circuit diagram.
- CBSE CLASS XII - 2025
- Current electricity
(a) Calculate the standard Gibbs energy (\(\Delta G^\circ\)) of the following reaction at 25°C:
\(\text{Au(s) + Ca\(^{2+}\)(1M) $\rightarrow$ Au\(^{3+}\)(1M) + Ca(s)} \)
\(\text{E\(^\circ_{\text{Au}^{3+}/\text{Au}} = +1.5 V, E\)\(^\circ_{\text{Ca}^{2+}/\text{Ca}} = -2.87 V\)}\)
\(\text{1 F} = 96500 C mol^{-1}\)- CBSE CLASS XII - 2025
- Electrochemistry