Unit 1 - Animal Behavior and Natural Selection pt.2! Flashcards
What needs to happen for natural selection to occur?
Over production, genetic variation, competition, and reproduction.
What is population?
Population is a group of individuals of a single species living in the same general area.
What was the primordial environment of earth?
Earth had a hydrogen based environment. Some molecules included methane, hydrogen, and ammonia.
How are peptide bonds formed?
Peptide bonds are formed through a dehydration reaction between two amino acids.
What is the structure of a phospholipid?
Phospholipids have a hydrophilic head and two hydrophobic tails. An unsaturated fatty acid and a saturated fatty acid make up the hydrophobic tails.
What is the structure of a phosphate group?
a phosphorus atom is bonded to four oxygen atoms; one oxygen is bonded to the carbon skeleton; two oxygens carry negative charges
What does it mean when a molecule is polar?
This means that the molecule has a partial charge and can mix with water.
What is a polymer?
A polymer is a long molecule consisting of many similar or identical building blocks linked by covalent bonds.
What are some of the functions of polysaccharides?
Some polysaccharides serve as storage material and others serve as building material for structures that protect the cell or the whole organism.
What are all the functions of proteins?
Transportation, movement, storage, structural support, cell communication, defense, and catalyzing chemical reactions
What is sexual selection?
It’s when an individual chooses a mate of the opposite sex based on a certain trait or a behavior performed.
What is speciation?
the process by which one species splits into two or ore species.
Why can sexual selection be harmful to some animals?
The trait may be tiresome or a hassle to the animal with the trait. For example, the attractive trait for peacocks is a large tail, but this can make the individuals with this trait easier to catch for predators.
What are the prezygotic barriers?
Habitat isolation, temporal isolation, behavioral isolation, mechanical isolation, & gametic isolation.
What are the postzygotic barriers?
Reduced hybrid viability, reduced hybrid fertility, and hybrid breakdown.
