Immune system—intake and distribution of oxygen to cells of the body
Excretory system—remove potentially dangerous materials from the body
Digestive system—transport energy-rich molecules to cells
Circulatory system—produce building blocks of complex compounds
The cells are produced by mitosis and contain all the genetic information of the father.
If one of these cells fertilizes an egg, the offspring will be identical to the father.
Each of these cells contains only half the genetic information necessary for the formation of an offspring.
An egg fertilized by one of these cells will develop into a female with the same characteristics as the mother.
Protein synthesis, respiration, digestion of food molecules
Active transport, recognition of chemical messages, protection
Enzyme production, elimination of large molecules, duplication of DNA codes
Release of ATP molecules, regulation of cell reproduction, food production
Live bacteria that ingest viruses
White blood cells from an infected individual
Weakened viruses associated with the infection
A variety of microbes that will attack the virus
Produce a hormone involved in respiration
Have the same genetic information but perform different specialized functions
Use one part of the genetic code to synthesize all enzymes needed by the cell
Contain different numbers of DNA molecules
Cells and organs
Cells and tissues
Tissues and organelles
Organelles and cells
Mutate fungal DNA and introduce the mutated DNA into species B using a virus
Add DNA from species B into the soil around species A
Insert the gene for the protein from species B into a chromosome in species A
Cross species A and a fungus to stimulate the synthesis of this protein
Why some offspring are genetically identical to their parents
The process of differentiation in offspring
Why some offspring physically resemble their parents
The origin of new combinations of traits in offspring
Increased use of starch in root cells
Increased concentration of glucose in leaf cells
Decreased ATP in root cells
Decreased concentration of oxygen in leaf cells
Four types of base subunits
Folded chains of glucose molecules
Twenty different kinds of amino acids
Complex, energy-rich inorganic molecules
The production of gametes
Faulty genes found in aquatic organisms
Development influenced by the environment
The production of new organisms by environmental engineering
Genetic alterations occur every time cell reproduction occurs.
The fossil record provides samples of every organism that ever lived.
Populations that have advantageous characteristics will increase in number.
Few organisms survive when the environment remains the same.
The skin cells of the mother
The gametes of either parent
All the body cells of both parents
Only the nerve cells of the father
Develop many mutated cells
Become extinct over time
Begin to reproduce sexually
Develop resistance to diseases
Increased gene recombinations
Increased number of males produced
Decreased number of eggs used
Decreased biodiversity within the species
Decreased digestive activity in the stomach of the fetus
A decrease in the amount of oxygen in the ovary of the mother
Inhalation of secondhand smoke by the fetus
Toxins in the bloodstream of the mother
Delivery of sperm
Production of gametes
Production of hormones
Excretion of urine
Produce light energy
Decompose organic matter
Predators that outnumber their prey
A continual input of energy
Limited autotrophic nutrition
No competition between species
Alteration of DNA molecules
A sudden mutation
Stable ecosystem that can last for many years
Loss of heterotrophs that cannot be recovered
Long-term rise in environmental temperatures
Forest consisting of only producers and decomposers
The ovary releases estrogen, which quickly binds to cell receptors.
Blood flow throughout the entire body is suddenly reduced.
White blood cells release enzymes in response to the proteins on inhaled pollen.
Mitochondria stop functioning in a unicellular organism exposed to pollutants.