In Australia, marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as :
1. Adaptive Radiation
2. Divergent Evolution
3. Cyclical Evolution
4. Convergent Evolution
A population of a species invades a new area. Which of the following condition will lead to Adaptive Radiation?
1. | Area with a large number of habitats having very low food supply |
2. | Area with a single type of vacant habitat |
3. | Area with many types of vacant habitats |
4. | Area with many habitats occupied by a large number of species |
Which of the following statements is correct about the origin and evolution of men?
1. | Agriculture came around 50,000 years back. |
2. | The Dryopithecus and Ramapithecus primates existing 15 million years ago, walked like men. |
3. | Homo habilis probably ate meat. |
4. | Neanderthal men lived in Asia between 100000 and 40000 years back. |
Match the hominids with their correct brain size:
Column I | Column II | ||
(a) | Homo habilis | (i) | 900 cc |
(b) | Homo neanderthalensis | (ii) | 1350 cc |
(c) | Homo erectus | (iii) | 650-800 cc |
(d) | Homo sapiens | (iv) | 1400 cc |
Select the correct option.
Options: | (a) | (b) | (c) | (d) |
1. | (iv) | (iii) | (i) | (ii) |
2. | (iv) | (i) | (iv) | (ii) |
3. | (iii) | (ii) | (i) | (iv) |
4. | (iii) | (iv) | (i) | (ii) |
In a species, the weight of a newborn ranges from 2 to 5 kg. 97% of the newborns with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 kg to 5 kg die. Which type of selection process is taking place?
1. | Cyclical selection | 2. | Directional selection |
3. | Stabilizing selection | 4. | Disruptive selection |
A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
1. 0.16 (AA); 0.36 (Aa); 0.48 (aa)
2. 0.36 (AA); 0.48 (Aa); 0.16 (aa)
3. 0.16 (AA); 0.24 (Aa); 0.36 (aa)
4. 0.16 (AA); 0.48 (Aa); 0.36 (aa)
Variations caused by mutation, as proposed by Hugo de Vries, are:
1. | small and directionless | 2. | random and directional |
3. | random and directionless | 4. | small and directional |
Which of the following refers to correct example(s) of organisms that have evolved due to changes in environment brought about by anthropogenic action?
(a) Darwin's Finches of Galapagos islands
(b) Herbicide-resistant weeds
(c) Drug-resistant eukaryotes
(d) Man-created breeds of domesticated animals like dogs
1. (a) and (c)
2. (b), (c) and (d)
3. only (d)
4. only (a)
From his experiments, S.L. Miller produced amino acids by mixing which of the following in a closed flask:
1.
2.
3.
4.
Flippers of Penguins and Dolphins are examples of:
1. | Convergent evolution | 2. | Industrial melanism |
3. | Natural selection | 4. | Adaptive radiation |