(A) | Thecodonts are extant ancestors of crocodiles and birds. |
(B) | Mammals have evolved from sauropsids. |
(C) | Snakes are closer to lizards than tuataras. |
(D) | Birds are closer to dinosaurs than crocodiles. |
1. | Karl Ernst von Baer | 2. | Ernst Haeckel |
3. | Charles Darwin | 4. | Lamarck |
Column-I | Column-II | ||
a. | Australopithecines | (i) | Probably ate meat |
b. | Homo erectus | (ii) | Walked like gorillas |
c. | Neanderthal man | (iii) | Hunted with stone weapons but essentially ate fruits |
d. | Ramapithecus | (iv) | (iv) Lived in near east and central Asia |
(a) | Seed ferns are common ancestors for Gnetales and cycads. |
(b) | Zosterophyllum are avascular land plants that evolved in the Silurian period. |
(c) | Lycopods are the oldest extant vascular land plants. |
(d) | Sphenopsids evolved from the group of plants to which Psilophyton belongs. |
Statement A: | Similarities in proteins and genes among diverse organisms indicates common ancestry. |
Statement B: | Humans and chimpanzees also show biochemical similarities. |
1. | Pre-existing advantageous mutations when selected will result in observation of new phenotypes |
2. | Exposure to antibiotics causes mutation that confer antibiotic resistance |
3. | Mutations are directional variations |
4. | All antibiotic resistant bacteria which exist today are result of artificial selection |