EVOLUTION
EVIDENCE FOR EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Dolphins reproduce using gametes, and so did ichthyosaurs.
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Dolphins are eukaryotic organisms, and so were ichthyosaurs.
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Dolphins have the same number of chromosomes that ichthyosaurs had.
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Dolphins are adapted to the same types of environments that ichthyosaurs lived in.
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Detailed explanation-1: -Describe how scientists used molecular evidence to determine that cacti and Euphorbia are not closely related plants. Scientists probably took DNA samples from both plants and found there to be many differences in the amino acid sequence.
Detailed explanation-2: -If you wanted to find out whether sharks and dolphins share homologous structures, what structures would you examine? Although their skeletons are made of different materials, there are likely to be homologous structures in the skull, backbone, and limbs.
Detailed explanation-3: -Fossils provide important evidence for evolution and the adaptation of plants and animals to their environments. Fossil evidence provides a record of how creatures evolved and how this process can be represented by a ‘tree of life’, showing that all species are related to each other.
Detailed explanation-4: -Humans, chimpanzees, gorillas, orangutans and their extinct ancestors form a family of organisms known as the Hominidae. Researchers generally agree that among the living animals in this group, humans are most closely related to chimpanzees, judging from comparisons of anatomy and genetics.