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BIOS 1030 Ch 1: Intro to Bio & Evolution
Terms in this set (19)
When did the following occur:
-Beginning of Earth
-First prokaryotic cells
-First eukaryotic cells
-Oldest human ancestors
Beginning of Earth: 4.5 bya
Prokary: 3.8 bya
Eukary: 1.7 bya
Oldest: 5-7 may
Modern: 200,000 ya
Name some signs of life.
-composed of cell(s)
-respond to stimuli
-growth + stimulation
Name the characteristics of a eukaryote cell.
At least one cell
DNA within a nucleus
Humans, other animals, plants, fungi, protists
Much larger (10-100um)
Have membrane-bound organelles
Name the characteristics of a prokaryote cell.
DNA NOT in a nucleus
much smaller (1-2 um)
Bacteria & archaea
What acronym is used to classify the hierarchy of living things?
On what end of the hierarchy is it more broad? More exclusive/specific?
What are the 3 domains? Characteristics of each?
Archaea-prokaryote, bacteria in extreme conditions
Eukarya-eukaryote, divided into 4 kingdoms
What are the 4 kingdoms in the domain Eukarya? Give characteristics of each based on feeding habits and the number of cells they are made up of.
Protista- single cell, autotroph/heterotroph
Plantae- multicellular, autotroph
Fungi-usually multicellular, heterotroph
Animalia- multicellular, heterotroph
What type of cell was the first cell on the planet?
Being able to maintain internal environment
What is the binomial nomenclature? Why is it important to science?
Scientific way of naming all organisms. It combines two into one to give all species a specific scientific name. (genus, species). Important because it will eliminate the confusion of common names
What are 4-5 characteristics that help to separate humans from other living organisms?
Bipedalism, opposable thumbs, large brain, complex languages, culture/morality/emotions
What is natural selection? Give 3 criteria that must be met for natural selection to occur.
large scale/non-random process that directs evolution
Variation, Inheritance, Differential survival/reproduction
What is fitness? An adaptation?
Fitness- reproductively more successful, have more offspring
Adaptation- a trait that increases an organism's survival & reproduction of an individual in a particular environment
Name some selective pressures that can cause natural selection to occur.
Predators, lack of food/water, competition, weather
What did the video of the snakes and newts demonstrate?
Selective pressure: The garden snake is able to resist the toxins of the newt so the newt is becoming is becoming even more toxic with time to resist the snake
What did the Californian salamanders video demonstrate?
Speciation: creating a new species
What is a species?
Individuals that can mate with each other and produce viable offspring
What are some limits of science?
-Can't prove anything (only support hypothesis)
-Limited tests on humans
Recommended textbook explanations
Kenneth R. Miller, Levine
Texas Science Fusion: Grade 7
Nelson Science Perspectives 10
Christy C. Hayhoe, Doug Hayhoe, Jeff Major, Maurice DiGiuseppe
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