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1. 
What is a native plant?
A.
A plant whose introduction into an ecosystem is likely to cause economic or environmental harm
B.
A plant that has evolved over hundreds or thousands of years in a particular region or ecosystem
C.
A plant that non-native to a host ecosystem but doesn't cause direct harm.
2. 
Which of the following plants represents an invasive plant?
A.
B.
C.
3. 
Select the choices that most accurately describe the effect that invasive plants can have on their host ecosystem.
A.
Invasive plants can grow quickly and spread widely throughout an ecosystem without any interference
B.
Invasive plants are often able to out-compete other plants for important resources like water, nutrients, and sunlight
C.
Invasive plants reduce biodiversity within the ecosystem which can make that ecosystem more susceptible to things like disease and natural disasters
D.
All of the above
4. 
What concept does the following example illustrate? Entomologist Doug Tallamy showed that native oak trees are home to over 500 species of caterpillars. In contrast, ginkgos, a non-native landscape tree from Asia, can host only 5 species of caterpillars.
A.
Native plants are worse than non-native plants because they have more bugs on them
B.
Native plants require more pesticide use than non-native plants
C.
Native plants are better at supporting other plant and animal species in their ecosystem than non-native plants
D.
Non-native plants can grow very quickly and spread widely throughout an ecosystem
5. 
How do monarch butterflies relate to the native and invasive plants in the Charles River parks?
A.
Monarch butterflies need the common milkeed plant to survive because monarch larvae can only eat milkweed.
B.
Monarch butterflies do not exist in the Northeast.
C.
Monarch butterflies may lay their eggs on black swallow-wort vines because it's part of the milkweed family. These eggs will not survive
D.
Both A and C.
6. 
Which of the following is a native plant?
A.
B.
C.
7. 
How do invasive plants out-compete native plants for for important resources like water, nutrients, and sunlight?
A.
Some invasive plants are allelopathic, meaning they can release a chemical that will hinder the growth of other plant species near them
B.
Some invasive plants have effective seed dispersal mechanisms, allowing them to reproduce quickly
C.
Some invasive plants are toxic or distasteful to the local wildlife and are not eaten by herbivores, allowing them to grow unimpeded
D.
All of the above could be possible reasons why invasive plants can out-compete other plants
8. 
What is the name of the plant in the image below?
A.
New England aster
B.
Black swallow-wort
C.
Common milkweed
D.
Winterberry
9. 
What is the name of the plant in the image below?
A.
Common milkweed
B.
Staghorn sumac
C.
Garlic mustard
D.
Japanese Knotweed
10. 
What is the name of the plant in the image below?
A.
Silver maple
B.
Winterberry
C.
Oriental bittersweet
D.
Phragmites