Sunday, January 12, 2014

Big Idea 3


1. diploid - An organism that is diploid has two sets of chromosomes, usually one from each parent.  Almost all animals, including this snow leopard, have diploid cells.


2. ethylene - Ethylene is a hormone given off by some fruits and vegetables when they begin to ripen.  It causes itself and other fruits and vegetables near it to ripen faster.  An apple is a fruit that gives off ethylene when it ripens.


3. eukaryote - A eukaryote is an organism whose cells have a membrane-bound nucleus and membrane-bound organelles.  All animals, including this iguana, have eukaryotic cells.

                          

6. evidence of different alleles (2 pictures) - An allele is a different form of the same trait, and usually happens because of a mutation.  Orchids come in different colors, white and purple, because their color is determined by an allele.


8. flock, herd, or schooling - A flock, herd, or schooling of animals is a group of them.  Animals like to move and live and groups because it allows them to provide each other with food, safety, and support.  A group of ducks is called a flock.


14. mitosis - Mitosis is the process of cell division in somatic cells.  Basically, one cell divides into two identical daughter cells.  All animals, such as this duikon, undergo mitosis in some of their cells.


16. phenotype - A phenotype is an expressed and observed trait.  It is determined by genetic makeup.  This sleeping lion's hair has a brownish phenotype.


18. prokaryote - A prokaryote is an organism whose cells do not have a membrane-bound nucleus nor membrane-bound organelles. Bacteria, which is a prokaryote, is used in the production of cheese.


19. seed dispersal method - The seed dispersal method is the movement and scattering of seeds to places other than where the seed came from, or the parental plants.  Squirrels take acorns (oak tree seeds) and bury them in other places.

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