Big Idea 3

3)  Eukaryote: A eukaryote is an organism that contains more than one cell and has membrane-bound organelles.  This rhododendron is composed of more than one cell and has organelles such as chloroplasts.

 

7)  Evidence of different alleles for the same trait: Alleles are alternative forms of a gene that occur at the locus.  These two Labrador retrievers have two variations of the hair color allele, one yellow and one black. 

 

8)  Flock, herd, or schooling:  A flock is a group of animals of the same species assembled or crowded together.  The geese in this picture form flocks.

 

10)  Genetically modified organism:  Organisms can be genetically modified by altering genetic material using genetic engineering techniques.  Some crops such as this alfalfa are genetically modified to produce better crop yields.

 

11)  Herbivory responses:  Herbivory responses are adaptations that plants evolve to improve survival and protection against herbivores.  For example, this cactus has thorns that deter animals from eating it to get water.

 

16)  Phenotype:  The phenotype of a trait is the physical or visual appearance of how the gene is expressed.  Ornamental cabbages can have different leaf colors (green, white, pink, and purple), such as this one which has purple leaves.

 

17)  Pollinator:  Pollination is a process whereby pollen is transferred from one plant to another of the same kind in order to produce seeds.  Bees are pollinators, animals that perform pollination.

 

18)  Prokaryote:  A prokaryote is a cell that does not have a membrane-bound nucleus or organelles.  This pond algae is an example of cyanobacteria, a major class of prokaryotes.

 

19)  Seed dispersal method:  Seed dispersal is a methods for moving or transporting seeds away from the parent plant.  The most common methods are by wind, by water or by animals.  For example, squirrels eat acorns and undigested seeds get spread to other places in their waste.   

 

20)  Tropism:  Tropism is the response of an organism towards an external stimulus.  Thigmotropism is a type of tropism in plants, such as this Virginia Creeper vine, in which the plant grows in response to contact with something like a wall or fence.