Download Animal Sciences. A-Crep by Allan B. Cobb PDF

By Allan B. Cobb

ISBN-10: 0028655575

ISBN-13: 9780028655574

Show description

Read Online or Download Animal Sciences. A-Crep PDF

Best zoology books

The Wild Cat Book: Everything You Ever Wanted to Know about Cats

From the traditional Egyptian cat goddess, Bastet, to the prophet Muhammad’s favourite cat, Muezza, and our modern obsession with on-line cat video clips, pussycats have lengthy held a spot of honor of their human counterparts’ houses and cultures. however the household cat is only one of many pussycat species, and within the Wild Cat e-book cat specialists Fiona and Mel Sunquist introduce us to the total panoply of the purring, roaring tom cat tribe.

Horses (First Step Nonfiction - Farm Animals)

Take a trip to the farm and know about the gains and roles of a horse.

Boom and Bust: Bird Stories for a Dry Country

Winner of the 2009 Whitley MedalIn increase and Bust, the authors draw at the traditional background of Australia’s charismatic birds to discover the family members among fauna, humans and surroundings. they give thought to altering principles approximately deserts and the way those have helped to appreciate birds and their habit during this driest of continents.

Chasing Monarchs: Migrating with the Butterflies of Passage

The monarch butterfly is our best-known and best-loved insect, and its annual migration over millions of miles is a rare typical phenomenon. Robert Michael Pyle, "one of America's most interesting common background writers" (Sue Hubbell), set out past due one summer season to stick with the monarchs south from their northernmost breeding floor in British Columbia.

Additional info for Animal Sciences. A-Crep

Sample text

S. Problems of Relative Growth. New York: Dial Press, 1932. Thompson, D. W. On Growth and Form. : Cambridge University Press, 1942. Altruism Altruism, defined as an action that benefits the receiver but comes at some cost to the performer, is one of the four types of social interactions that can occur between animals of the same species. Figure 1 summarizes these four interactions. Cooperation, where both actor and receiver benefit, and selfishness, where the action benefits the actor at the expense of the receiver, are by far the most common of the four interactions in nature.

Caecilians also possess a unique sense organ called the tentacle, which is found between the nostril and the eye. It functions as a chemical sensor (detector). Caecilians feed primarily on earthworms and other invertebrates. Unlike frogs and salamanders, caecilians do not use tongue projection to capture prey. Rather, they catch a worm with their jaws, spin it lengthwise in order to remove and ingest a piece, and then try to catch the worm again. viviparous producing living young (instead of eggs) that were nourished by a placenta between the mother and offspring Also in contrast to frogs and salamanders, more than half of caecilian species are viviparous, or live bearing.

For example, seagulls sometimes steal food from nesting neighbors to feed themselves and their chicks. This behavior clearly increases the fitness of the actor while natural selection the process by which organisms best suited to their environment are most likely to survive and reproduce Social Interactions that can occur between animals of the same species. 17 Altruism decreasing the fitness of the receiver; it is selfish. Imagine an altruistic seagull that willingly provided food for its neighbors.

Download PDF sample

Rated 4.89 of 5 – based on 11 votes