Question

Why human, monkey, horses and birds are considered to have evolved from the same ancestors?​

Answer 1

Humans, monkeys, horses, and birds are believed to be related because of evidence from homologous structures, embryological similarities, and the fossil record, all pointing to a common ancestry. These biological features demonstrate how from an original ancestor, different species evolved and adapted to various environments and ways of life.

Step-by-step explanation:

Humans, monkeys, horses, and birds are considered to have evolved from the same ancestors due to evidence from homologous structures, similar embryonic development, and fossil records that follow a common evolutionary pathway. Homologous structures, such as the forelimbs of humans, bats, birds, horses, and whales, suggest a shared ancestry even though these appendages have evolved in different directions for various species. The structures are similar in their skeletal construction, indicating they derived from a common ancestor before diverging and adapting to their own niches.

The similarities between embryos of different species also signify they share common ancestors. Humans and chimpanzees, while not evolved from one another, have analogous embryonic stages, which implies a common evolutionary path that branched in different directions. Moreover, the fossil record and evolutionary history indicate a rich tapestry of speciation events, where mammals like primates, which include humans, evolved through a series of adaptations influenced by environmental changes, diets, and survival strategies.

Answer 2

Everything at some point belonged to a common ancestor, but these four species are considered to be like this because of similar ancestral traits that have been passed on to generations such a homologous pairs, vestigial structures, they are all mammals, similar amino acid sequences, vertebraes, etc.