By Rene Fester Kratz PhD, Donna Rae Siegfried

An up to date variation of the last word consultant to knowing biology

Ever puzzled how the foodstuff you consume turns into the strength your physique must hold going? the idea of evolution says that people and chimps descended from a standard ancestor, yet does it let us know how and why? We people are insatiably curious creatures who can not help brooding about how issues work — beginning with our personal our bodies. would it be nice to have a unmarried resource of fast solutions to all our questions about how residing issues paintings? Now there's.

From molecules to animals, cells to ecosystems, Biology For Dummies, second version solutions your entire questions about how residing issues paintings.

  • Written in simple English and choked with dozens of illustrations, quick-reference
  • Cheat Sheets, and beneficial tables and diagrams, it cuts correct to the chase with fast paced, easy-to-absorb factors of the lifestyles procedures universal to all organisms.
  • More than 20% new and up-to-date content material, together with a considerable overhaul to the association of themes to make it a pleasant school room complement
  • Coverage of the newest advancements and discoveries in evolutionary, reproductive, and ecological biology
  • Includes functional, up to date examples

no matter if you are at present enrolled in a biology classification or simply need to know extra approximately this attention-grabbing and ever-evolving box of research, this attractive advisor provides you with a grip on complicated biology innovations and unencumber the mysteries of ways lifestyles works very quickly.

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Additional resources for Biology For Dummies

Sample text

Coli are made up of the same raw materials (flip to Chapter 3 to find out what those are) and have DNA as your genetic material (more on DNA in Chapter 8). You also use food the same way (see Chapter 5), and you build your proteins in the same manner (see Chapter 8). Life Begets Life: Reproduction and Genetics You began life as a single cell, when a sperm cell from your dad met an egg cell from your mom. Your parents made these reproductive cells through a special type of cell division called meiosis (we explain meiosis in detail in Chapter 6).

When a scientist designs an experiment, he tries to develop a plan that clearly shows the effect or importance of each factor tested by his experiment. Any factor that can be changed in an experiment is called a variable. Three kinds of variables are especially important to consider when designing experiments: ✓ Experimental variables: The factor you want to test is an experimental variable (also called an independent variable). ✓ Responding variables: The factor you measure is the responding variable (also called a dependent variable).

B. Sodium and chloride ions joining to form table salt. The sodium ion has a positive charge because there’s one more proton than electrons, so the overall charge is positive. The chloride ion is negative because after it accepts the electron from sodium, it then has one more electron than protons (18 versus 17), so the overall charge is negative. Together, though, NaCl is neutral because the "plus 1" charge is balanced by the "minus 1" charge. Chloride ion Sodium ion 11p 17p Sodium has the right number of electrons to balance its protons, but it donates the one that’s alone in the outer shell.

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