has a nucleus and membrane bound organelles..also is more complex
What is a eukaryotic cell?
100
during this type of selection an extreme allele becomes less frequent than the average and other extreme
What is directional selection?
100
portion of DNA that is responsible for inheritance of a trait
What is a gene?
100
sunlight, precipitation, and type of soil present are...
What are abiotic factors?
100
type of molecule that makes up the double layer of the cell membrane
What is a lipid?
200
molecule needed to provide the energy for ions to move against their concentration gradient
What is ATP?
200
the process in which nature selects individuals better adaptated to their environment
What is natural selection?
200
field of biology that deals with producing large quantities of human growth hormone using bacteria and recombinant DNA
What is genetic engineering?
200
earthquakes, floods, volcanic eruptions are types of this...
What is density independent factor?
200
what would happen to the water inside a plant cell during a period of severe drought
What is it would leave the cell, the cell would shrink and cause the plant to wilt?
300
molecule in the cell membrane that contains a hydrophobic region and acts as a barrier to foreign substances
What is a phospholipid?
300
these are used to determine the relationship between two organisms
What are bone structure, fossil age, and genetic traits?
300
if two heterozygous individuals are crossed in a dihybrid cross, what are the phenotypic results
What is 9:3:3:1?
300
population size the environment can support for a long time
What is carrying capacity?
300
failure of chromosomes to separate properly during meiosis which results in an abnormal karyotype
What is nondisjunction?
400
relative concentration of solutes inside and outside a cell that cause water to move across the membrane
What is osmosis?
400
decrease genetic diversity and eliminates that extremes of a trait are characteristics of this....
What is stabilizing selection?
400
type of inheritance pattern where both versions of a trat are expressed in the phenotype of the offspring
What is codominance?
400
if the number of deaths and emigration from an ecosystem is greater than the number of births and immigration, what will happen to the population size?
What is it will decrease?
400
chromosomes uncoil, spindle dissolves, and nuclear envelope froms at each pole
What is telophase?
500
produces genetically identical daughter cells
What is mitosis?
500
if two populations are separated by a river what type of selection is this
What is geographic isolation?
500
environmental factors that cause genetic mutations
What are radiation, chemical agents, and viruses?
500
in this type of population growth model, the birth rate remains constant while the deathe rate decreases
What is the exponential growth model?
500
a poison or toxin binds to an enzyme instead of the substrate and prevents this function
What is the catalysis of the reaction with the substrate?