NEW
Font size
WorksheetsCosmos: Episode 2
Total questions: 12
Worksheet time: 6mins
When humans force evolution by selecting certain traits to breed for, this is
natural selection
dna fingerprinting
artificial selection
codominance
What trait was selected for in wolves that led to domestication?
Lower levels of stress hormones
Sharper teeth
Aggressive behavior
Humans have a common ancestor with
Bacteria
Trees
Wolves
All of the above
The trunk on the tree of life represents
Dinosaurs
Apes
Single-cell organisms
Bananas
How many major extinction events do we know about?
1
5
10
Thousands
Who in the world can have identical DNA to you?
Only an identical twin
Any other mammal
Any other living creature
Any other human
The rivers and rain on Titan are composed not of water but of:
Copper
Methane
Coffee
Uranium
Broken limbs on the tree of life represent
Humans
Sterile animals
Extinct species
Animals with short life spans
Why was white fur selected for in bears at the North Pole?
It allowed them to reflect more sunlight
It gave them better heat regulation
It helped them blend in with the snow and ice to sneak up on prey
It made them cuter
What trait is coded for in both trees AND humans?
How to undergo photosynthesis
How to grow a layer of bark
How to metabolize sugar
How to jump really high
True or False: On the "Tree of Life", distantly related species are located on different trees
TRUE
FALSE
What were the first creatures to be able to sense light?
Humans
Worms
Aquatic bacteria
Whales
