Animal Sciences. A-Crep by Allan B. Cobb

By Allan B. Cobb

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Several separate lineages of frogs have adapted to arboreal habitats. These species are characterized by adaptations such as expanded toe pads and opposable thumbs. They also tend to locomote by body plan the overall organization of an animal’s body fertilization the fusion of male and female gametes metamorphose to change from a larva to an adult arboreal living in trees 21 Amphibia torpid a hibernation strategy where the body temperature drops in relation to the external temperature walking hand over hand rather than jumping.

Ventral the belly surface of an animal with bilateral symmetry Annelids possess both circular and lengthwise muscle fibers. These, combined with their segmentation and hydrostatic skeleton, allow for great flexibility in movement. One part of the body is able to contract, or change its diameter and length, without affecting the rest of the body. It is believed that the need for elaborate mechanisms to control motion led to the development of the comparatively complex nervous system of annelids.

Tactile the sense of touch chemoreceptors a receptor that responds to a specific type of chemical molecule photoreceptors specialized cells that detect the presence or absence of light dioecious having members of the species that are either male or female filter feeders animals that strain small food particles out of water Polychaeta. The Polychaeta, or bristleworms, are a large and diverse group that includes polychaete worms, lugworms, ragworms, and sandworms, among other groups. It is the largest annelid class, with over 10,000 species, most of which are marine.

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