Adaptations
Adaptations ___________ an organism's survival.
help
Some symbiotic relationships result in both species benefitting. What is that called?
Mutualism
Which type of succession takes hundreds of years because no life was in the area?
Primary succession
What ship did Darwin sail on for 5 years?
HMS Beagle
Evolution occurs by means of ___________.
natural selection
What is natural selection?
Organisms better suited to the environment will likely live longer and pass on their traits
A tick drinks blood and can harm the organism it bites. What is the tick?
A parasite
How does a pioneer species prepare the area for other plants to grow there?
They break up rock to create soil and add nutrients to the ground
What type of scientist was Darwin?
What is variation?
Differences among traits
A frog has a sticky tongue to help it hunt and catch bugs for food. What is the frog called?
A predator
A tick drinks blood and can harm the organism it bites. What is the organism the tick bit called?
A host
Name the 2 pioneer species - the first to grow in a barren area.
moss and lichen
Darwin used ______________ to compare living species to those of the past.
fossils
Name 3 things that affect natural selection.
overproduction
variation
competition
A lion and leopard both hunt the same gazelle herd. What type of interaction is this an example of?
Competition
What is commensalism?
A relationship in which one organism benefits but the other does not benefit but is not harmed
How is secondary succession different from primary succession?
Secondary succession is faster since life is already there
What is artificial selection?
Controlling which organisms can breed and pass on traits (human controlled natural selection)
What is the name of Darwin's book?
On the Origin of Species
What is a niche?
The specific role an organism plays within the environment
What happens in a parasitic relationship?
One organism benefits but the other is harmed
Name 4 things that can cause an ecosystem to change?
floods, mining, farming, tornado, volcano, fires
A well tested scientific concept
What is a homologous structure?