Lesson 1
What is the Driving Question?
How do we know the 8.7 million species on Earth are related?
What is the Driving Question?
“What can physical characteristics of organisms and their ancestors tell us about relatedness?
What does DNA analysis tell us?
tell us if certain traits that organisms have in common come from the same gene.
What does fertile mean?
means they are able to reproduce themselves
What is the driving question for lesson 5?
“How and why is the number of species changing today and what can we do about it?”.
How do we know species are related?
Similar traits, DNA
What can fossils show us about species?
They share common ancestors.
What is the Driving question?
“How can DNA analysis help us understand how organisms are related?”
What is a species?
A species is a group of organisms that can reproduce with one another (interbreed) and produce fertile offspring.
Define Biodiversity
Biodiversity is the total variety of life on Earth on all scales (habitats, species, individuals, characteristics or genes of those individuals).
What are the 2 cells in this lesson?
Prokaryote, Eukaryote
What is a phylogenetic tree?
Phylogenetic trees are branching models that scientists use to show relatedness and evolutionary histories.
What are the 2 common proteins?
Cytochrome C and Hemoglobin
What is the Driving question for this lesson?
Why and how do new species form or go extinct?
What does HIPPO mean?
habitat loss, invasive species, pollution, population growth of humans, overexploitation
Which cells has a nucleus?
Eukaryote
What does a single branch on a phylogenetic tree represent?
A lineage over millions of years, during which that population may have evolved and changed over time.
What does a slope in amino acid graph represent?
the rate of mutation which measures how quickly proteins accumulate changes.
why and how new species form or go extinct”?
Species go extinct because they cannot adapt quickly enough to a new environment. New species are able to fill new niches and thus survive and reproduce.
What is the cause description of population growth of humans?
Exponential growth of humans leading to increased use of resources and waste
What is found in the nucleus of the Eukaryote?
DNA
What does Transitional fossils have?
have features from both an ancestral species and a newer species, showing how major changes in traits happened over time.
What is a molecular clock?
are “constant” rates at which DNA changes in different proteins and in different species over time.
Why and how do new species form or go extinct?
New species form or go extinct because of changes in the environment and how populations respond to those changes.
Why is biodiversity a good thing?
Biodiversity is “a good thing” because it keeps our planet secure, providing us with a stable climate and carbon absorption, pollinators, food supply, medicines, protection of coasts, pollution and waste filtration and more.