Question 1.
Complete the following diagram
Answer:
Various evidences have been put forward to support of evolution theories, such as morphological evidence, embryological evidence, and anatomical evidence (similarities in bones) connecting links.
Embryological evidence:
The embryos of different vertebrates (examples are fish, salamander, tortoise chicken, cow human) show similarities in early stages of development and in the later stage of development similarities decreases. Similarities in initial stages of embryo development shows the common origin of all these animals.
Development of embryos in different vertebrates
Connecting links:
The animals or plants which possess the characteristics of two different groups of animals or plants. These plants or animals are ‘connecting links. For example, an animal duck billed platypus lays eggs like reptiles such as lizards, snakes, but share characters such as presence of mammary glands and hairs with mammals. Therefore, duck billed platypus shows link between reptiles and mammals.
