Download Grzimek's Student Animal Life Resource. Mammals by Grzimek PDF

By Grzimek

Show description

Read Online or Download Grzimek's Student Animal Life Resource. Mammals PDF

Similar science & technology books

Using Internet Primary Sources to Teach Critical Thinking Skills in Mathematics: (Greenwood Professional Guides in School Librarianship)

Arithmetic academics and college library media experts will locate this publication a worthwhile source for utilizing the internet to advertise severe pondering within the highschool arithmetic lecture room. it truly is packed with educational concepts and an expansive set of actions that disguise a extensive array of arithmetic themes spanning from prealgebra via calculus.

The Telephone: Wiring America (Building America: Then and Now)

Alexander Graham Bell's request for his assistant to 'come the following' revolutionized the best way America's voters communicated with each other. This booklet appears to be like on the invention of the phone and its integration into society.

Retool your school : the educator's essential guide to Google's free power apps

Good points why Google functions are the easiest unfastened on-line studying instruments to be had this present day. subject matters comprise how scholars and educators can collaborate with Google records, how the varieties program permits lecturers to create instant-feedback quizzes, and the way a literature category can take lit journeys with Google Maps.

Understanding Science Teachers’ Professional Knowledge Growth

Technological know-how schooling needs to be superior so as to turn into extra attentive to the wishes of society faced with a quickly altering international. Bringing technology instructing as much as a better point is a key think about this endeavour. The authors of this booklet take into consideration academics as a part of the quick and massive groups and platforms during which they functionality.

Additional resources for Grzimek's Student Animal Life Resource. Mammals

Sample text

Many human habits lead to endangerment. Hunting for amusement, killing for fur or body parts, native and commercial killing for food, fishing gear entrapment, land-destructive wars, and the illegal pet trade all take their toll. So do chemicals. Some mammals are probably on the way to extinction, or total elimination. There are only about sixty Java rhinoceros left in the world. The Seychelles sheath-tailed bat has only about fifty individuals remaining. Yellow-tailed woolly monkeys number no more than 250 individuals.

The monotreme eggshell is soft and leathery, and porous enough to soak up nutrients secreted into the oviduct from the mother’s circulatory system. The embryo begins its development before the egg is laid. When the mother lays her egg, the embryo has already developed to about the same degree as a newborn marsupial. 6 inches (13 to 15 millimeters) in diameter, or the size of a grape. After about ten days of the egg’s incubation, the young hatches by tearing at the shell by means of a temporary egg tooth on its snout.

Monotremes 3 Female echidnas and platypus may lay up to three eggs at a time, but one is normal, and monotreme females usually bear and raise only one young per year. Females do all the raising of the young. Except during the mating season, individual platypus and echidnas of both sexes lead solitary lives. A platypus mother incubates her eggs by curling her tail and holding the eggs between the tail and her warm underbelly. She incubates and nurses her young in a “birth chamber” burrow, which she digs and lines with moist leaves and water plants to maintain humidity.

Download PDF sample

Rated 4.63 of 5 – based on 41 votes