The lava lizard is a reptile which are native to South America. There are around 20 recognized species but only 7 of them are found on the Galápagos Islands. Lave lizards are omnivores and eat moths, flies, beetles, ants, spiders, grasshoppers and many other things. Lava Lizards can grow to be up to a foot in length, but are usually about 5 – 6 inches long. A common …show more content…
The diet of the Rice Rat includes grasses, seeds, fruits, crustaceans and small fish. The Rice Rat was probably nocturnal and inhabits burrows or rock crevices under bushes. The head and body of the Rice Rat measure 9 – 20 centimeters and it has a tail length of 7.5 – 25 centimeters. It weighs around of 40 – 80 grams.
The Galapagos land iguana is a reptile and lives in the drier areas of the islands on which they occur, in scrubby habitats. At night they sleep in burrows dug in the ground, to conserve their body heat. Land Iguanas feed mainly on low-growing plants and shrubs, such as the cactus, as well as fallen fruits and cactus pads, including the spines of the plants. If they survive the first difficult years of life, when food is often scarce and predators are a danger, land Iguanas can live for more than 50 years.
The Galapagos hawk is a large, dark colored bird with broad wings and a broad tail. The Galapagos Hawk is an active predator which feeds on small invertebrates. They play an important role at the top of the food chain. Galapagos Hawks can grow to be 55 centimeters long with a wingspan of 120 …show more content…
He also said that change is made by what the organisms want or need. Use and disuse states that when certain organs become specially developed as a result of some environmental need, then that development is hereditary and can be passed on. This “use and disuse” is one of the things Charles Darwin published from Lamarks evolution theory. Lamarks theory was rejected because an organisms behavior has no effect on its inheritable characteristics.
Thomas Robert Malthus was an English cleric and scholar, influential in the fields of political economy and demography. Malthus believed that population growth would always overpower food supply growth, creating everlasting states of hunger, disease, and struggle. The natural, ever-present struggle for survival caught Darwin’s eye. Darwin believed that population grew until they were aligned with existing resources, and then stabilized. Thomas Malthus’ work helped Darwin to refine the natural selection by stating a reason for meaningful competition between members of the same