Obtaining Inorganic Nutrients The individual organisms in an ecosystem need?organic molecules?to build their cells and tissues These molecules contain?carbon, hydrogen, oxygen, nitrogen, and phosph...
Community Species?do not exist by themselves in their own isolated environment; they?interact?with?other species, forming?communities A community can be defined as: Multiple populations of differen...
Autotroph vs Heterotroph Organisms need?energy in the form of?ATP?to survive The energy stored in ATP comes from other?organic molecules,?such as carbohydrates,?and is transferred during the proces...
Species A species can be defined as: A group of organisms that can interbreed to produce?fertile offspring The ability to breed and produce fertile offspring is a useful method of distinguishing sp...
Cloning Plants Design of an experiment to assess one factor affecting the rooting of stem-cuttings Stems can be cut so that?roots develop?from the cut end of the stem This is a way of?cloning plant...
Cloning Clones are groups of genetically identical organisms, derived from a single original parent cell A cloned cell is a cell that is?genetically identical?to the cell that it originated from Se...
Genetic Modification Genetic modification is carried out by gene transfer between species Genetic?modification?is a term usually used to refer to the transfer of DNA sequences from one species to a...
Use of DNA Profiling DNA profiling involves comparison of DNA DNA profiling?(genetic fingerprinting) enables scientists to?identify suspects for a crime?and?identify corpses?because every person (a...
Gel Electrophoresis Gel electrophoresis is used to separate proteins or fragments of DNA according to size Gel electrophoresis?is a technique used widely in the analysis of DNA, RNA, and proteins D...
Causes of Mutations A?mutation?is a change in the sequence of base pairs in a DNA molecule They occur?randomly?and?continuously?to create new alleles of a gene Often only with a very small number o...
Causes of Genetic Disease A gene can affect a?phenotype?of an organism A gene codes for a single polypeptide The polypeptide affects the phenotype through a particular mechanism The phenotype of an...
Constructing Punnett Grids A?monohybrid trait?is one that is controlled by only?one gene Generally, we consider that such a gene has?two alleles Either: one allele is dominant and the other is rece...
