Download Biology: 3 by Richard Robinson PDF

By Richard Robinson

Show description

Read or Download Biology: 3 PDF

Best biology & life sciences books

Image Analysis for Biological Sciences

Utilizing a statistical viewpoint, this paintings introduces a few functional examples from different varieties of microscopy, clinical imaging platforms, distant sensing and call prints to demonstate the various variety of picture research functions. Explains the character of electronic photos and terminology use.

What I Require From Life: Writings on Science and Life From J.B.S. Haldane

J. B. S. Haldane (1892-64) used to be one of many nice scientists--and nice technology writers--of the 20 th century. A polymath who used to be a valuable determine within the improvement of contemporary evolutionary biology, he used to be additionally a hugely expert essayist and a unprecedented character--brilliant, witty, idealistic, humorous, and pugnacious.

Extra resources for Biology: 3

Sample text

When the guard cells swell, the stomate closes, and this prevents the leaf from drying out. Between these protective epidermal layers, the leaf is filled with thinwalled parenchyma cells containing chloroplasts. Photosynthesis occurs within these cells, and evolution has produced modifications to aid this process. For instance, the cells in the layer just beneath the upper epidermis (closest to the incoming sunlight) are lined up like the logs driven into the ground to construct the stockade of a frontier fort.

Science News 158, no. 9 (26 August 2000): 140. Purvis, William. Lichens. Washington, DC: Smithsonian Institution Press, 2000. Life Cycle, Human The human life cycle begins at fertilization, when an egg cell inside a woman and a sperm cell from a man fuse to form a one-celled zygote. Over the next few days, the single, large cell divides many times to form a hollow ball of smaller cells. On the sixth day after fertilization, this hollow ball burrows into the wall of the mother’s uterus, or womb.

The tubular fluid next passes through a hairpin turn called the loop of Henle, which helps the nephron return more water to the bloodstream rather than allowing it to be lost in the urine. How this works will be explained later. Tubular fluid then enters the distal convoluted tubule of the nephron. Here further transport of particular ions may occur, depending on whether the concentration of that ion in the blood is too high or too low. For example, if the pH of the blood is too low, hydrogen ions (H+) are transported out of the blood and into the tubular fluid.

Download PDF sample

Rated 4.37 of 5 – based on 46 votes