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An example of a botanical genetic polymorphism is heterostyly, in which flowers occur in different forms with different arrangements of the pistils and the stamens. The system is called heteromorphic self-incompatibility , and the general 'strategy' of stamens separated from pistils is known as herkogamy .
Neoteny is seen in domesticated animals such as dogs and mice. [25] This is because there are more resources available, less competition for those resources, and with the lowered competition the animals expend less energy obtaining those resources. This allows them to mature and reproduce more quickly than their wild counterparts. [25]
Documentary film, shot at 1200 fps, used to study the locomotion of a cheetah. The end of the video shows the methods used for filming. A variety of methods and equipment are used to study animal locomotion: Treadmills are used to allow animals to walk or run while remaining stationary or confined with respect to external observers.
Diagram of stages of embryo development to a larval and adult stage. In developmental biology, animal embryonic development, also known as animal embryogenesis, is the developmental stage of an animal embryo. Embryonic development starts with the fertilization of an egg cell (ovum) by a sperm cell (spermatozoon). [1]
Adult tigers lead largely solitary lives within home ranges or territories, the size of which mainly depends on prey abundance, geographic area and sex of the individual. Males and females defend their home ranges from those of the same sex and the home range of a male encompasses that of multiple females.
The following outline is provided as an overview of and topical guide to zoology: . Zoology – study of animals.Zoology, or "animal biology", is the branch of biology that relates to the animal kingdom, including the identification, structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems.
Tardigrades feed by sucking animal or plant cell fluids, or on detritus. A pair of stylets pierce the prey; the pharynx muscles then pump the fluids from the prey into the gut. A pair of salivary glands secrete a digestive fluid into the mouth, and produce replacement stylets each time the animal moults. [ 3 ]
Biomechanically this is a unique and extreme feeding method, for which the animal at first must accelerate to gain enough momentum to fold its elastic throat (buccal cavity) around the volume of water to be swallowed. [25] Subsequently, the water flows back through the baleen, keeping back the food particles.