Unit 1 - Test Review Flashcards
What are the 5 essential life functions?
1) Maintain Homeostasis 2) Acquire Matter & Energy 3) Respond to stimuli 4) Reproduce 5) Evolve
what are the evidences of evolution?
- Fossil Record 2. Biogeography
- Embryology 4.Homologous/ Analogous Structures 5. Vestigial Structures 5. Molecular (DNA)
what is the theory of evolution?
Change over time
What is a Homologous Structure?
Same structure, different functions (shared by related species and inherited from a common ancestor)
What is a Analogous Structure?
The same function but different structure and development (the tail of a whale and fish)
Vestigial Structure
Structures that have lost their purpose over time (ex. wisdom teeth)
What are the elements contained in Nucleic Acid?
(CHONP) Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus
Adenine pairs with..
Thymine
Guanine pairs with…
Cytosine
What are the 2 types of nucleic acid
DNA & RNA
In RNA what is thymine replaced by?
Uracil
How many strands does a double helix have?
2 strands
Genome Map
An organism’s entire DNA sequence
What are nucleic acids?
A type of macromolecule that carries important info. - there are two types: RNA/DNA
Where is DNA found in Eukaryotic cells
nucleus
Where is RNA found?
nucleus and cytoplasm
Where is DNA and RNA found in prokaryotic cells
in the cytoplasm
What are Histones?
proteins that associate with DNA and help to pack and condense it
Hydrogen Bonds
connect the nitrogenous bases
Phosphodiester Bond
Connects the phosphate and deoxyribose
