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These two zebras are subspecies within the same species of plains zebra. On the right is Grant's zebra (image by David J. Stang), and on the left is Burchell's zebra (image by Hans Hillewaert). A species is a group of living things that can breed with each other. We can divide some (but not all) species into smaller groups called subspecies.
Some people think that the main differences between humans other animal species is our ability of complex reasoning, our use of complex language, our ability to solve difficult problems, and introspection (this means describing your own thoughts and feelings). Others also feel that the ability for creativity or the feeling of joy or sorrow is ...
Species that transmit diseases: There are over 30 Anopheles species that we know of that transmit malaria (of the total 430 Anopheles species). The main malaria vector is a subspecies of An. gambiae. Life cycle:Anopheles females may prefer human or cattle blood; this varies with species. Some species almost only feed on humans.
The science of classifying living things is called taxonomy.In a classification, a taxon is a group, and the smallest taxon is the species. Usually, only members of the same species can mate with each other and produce young—or seeds, in the case of plants. There are some exceptions to this rule, but often the young of mixed species cannot ...
Unlike human bones, birds have a lot more empty space inside their bones. Bird and bat bones also look smaller and more delicate than human bones. This was thought to make both bird and bat bones lighter so they can fly. Some recent research has shown this may not be true. Compared to most mammal bones, bird bones have more empty space inside ...
Aristotle (384-322 B.C.), an ancient Greek philosopher, was among the first people to think about the structure and function of human bodies. He was also the first to study animals and groups of animals in an organized way. He recorded observations on over 500 different animal species.
In other animal species, we sometimes notice differences in appearance that allow us to group them… usually into subspecies. So why can’t we sort the human species into smaller groups like we can with other animals? The answer is that the human species doesn’t have much genetic variation. We are too alike to split into groups.
The venom in a scorpion's stinger is the same all through a scorpion's life. Perhaps the biggest myth is that all scorpions are deadly, and this is totally wrong. Only a very few scorpions are potentially dangerous to people. Of the 1,500 known scorpion species only 25 have a sting potent enough to be considered potentially dangerous to humans.
Short segments of genes from a distant dog relative, the gray wolf, were found in every sample of the dogs’ genetic information. However, the nucleotides that make dogs look different were only found in a few areas of the DNA. These reflect the areas that have changed in the centuries since people started breeding dogs for different traits ...
Chromosomes come in matching pairs, one pair from each parent. Humans, for example, have a total of 46 chromosomes, 23 from the mother and another 23 from the father. With two sets of chromosomes, children inherit two copies of each gene, one from each parent. The image below, call a karyotype, shows the chromosomes of a human, lined up in pairs.