Ap Biology: Chapter 2

Building block for DNA – Nucleotide
Base pairing rules – Bases pair up according to this system of rules.
lipids – large macromolecules composed composed of mostly carbon and hydrogen and very little oxygen (ex. fats, waxes and oils)
exocytosis – The process used to get substances (which are not soluble in the cell membrane) out of a cell using vesicles.
Scurvy – is a disease caused by lack of vitamin C in which the body is unable to build enough collagen (a major component of connective tissue).
tRNA – transfer RNA; type of RNA that carries amino acids to the ribosome
ultrasound imaging – A technique for examining a fetus in the uterus. High-frequency sound waves echoing off the fetus are used to produce an image of the fetus.
allele frequency – measures how often a particular form of a gene appears in a population
Because of the near drowning, the young man experienced a temporary absence of oxygen, or
All the organisms on a campus make up… – a community
muscle tissue – Tissue made of cells capable of contracting.
Becаuse оf the neаr drоwning, the yоung mаn experienced a temporary absence of oxygen, or
Fetus – A stage of development after the embryo has all of its organs and systems in place. In humans that happens at around 8 weeks.
products – the result of a chemical reaction
cytoplasmic streaming – the motion of cytoplasm in a cell that results in a coordinated movement of the cell's contents
secondary succession – Succession when an existing community has been cleared, but soil left intact.
Chilopoda – Class of arthropods that includes the carnivorous centipedes

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