By CK-12 Foundation
CK-12 Biology I is a textbook for prime college scholars protecting mobilephone biology, genetics, evolution, ecology, and body structure.
Read Online or Download CK-12 Biology I - Honors PDF
Best biological sciences books
The booklet top referred to as Worms, known as earthworms, was once Charles Darwin's final clinical publication. He studied the earthworm habit and ecology. The trojan horse ecology was once the 1st very important paintings on soil bioturbation, the reformation of soils and sediments via animals or vegetation. the results of bioturbation encompass altering the feel of soil or diagenesis, the switch of sediments of sedimentary rocks into forming one other sedimentary rock in the course of and after rock formation.
This booklet, released in 1881, used to be the results of decades of experimentation and remark by means of Darwin within the open-air laboratory of his backyard at Down condo in Kent. As he wrote in his creation, the topic of soil disturbance by way of worms 'may seem a trifling one, yet we will see that it possesses a few interest'.
Publication by way of
Additional info for CK-12 Biology I - Honors
Pavement E. Pipings F. Soil Structure G. Soil Temperature VI. Accumulations in Desert Soils A. Carbonates B. Gypsum C. Silicates D. Iron E. Soluble Salts VII. Desert Soils as a Medium for Plants A. Moisture B. Nitrogen C. Phosphorus D. Potassium 31 32 34 34 36 37 37 38 38 38 38 38 39 39 39 40 42 42 44 47 48 51 51 53 53 53 54 57 58 59 61 61 61 61 66 32 WALLACE H. FULLER E. Micronutrients F. Organic Matter G. Salt H. Radioactive Debris VIII. Desert Soils and Microorganisms A. Microbial Populations B.
To the north, in the United Arab Republic, the finer-grained units appear to dominate in the upper part of the unit. The maximum thickness of the Nubian Aquifer in the Sudan is about 500 meters (El Boushi and Whiteman, 1967) and roughly 700 meters in the west central part of the United Arab Republic (Said, 1962). The exact age of the Nubian Aquifer is unknown. Most of the aquifer materials have a continental origin and lack fossils. Largely through dates on underlying and overlying beds, the Nubian Aquifer is assumed to be largely Lower and Middle Mesozoic.
A few exceed 2000 meters in depth. Water from some of the deepest wells reaches the surface with temperatures slightly greater than 100°C. The primary use of deep artesian wells in eastcentral Australia has been to provide water for stock. Some wells supply domestic, municipal, and minor irrigation needs, although the chemical quality of the water is commonly marginal for these uses (see Table I, sample 11). The deep artesian aquifers are Mesozoic continental sandstones, largely Jurassic, which are covered in much of the basin with thick Cretaceous clays.