Download Relationships in nature Study guide Matching: _____1. A close, long

Relationships in nature Study guide
Matching:
_____1. A close, long-term relationship
between two or more species
A. Commensalism
_____ 2. The struggle among living things to
obtain the resources needed to live is called —
B. Symbiosis
_____ 3. The organism that a parasite lives on
and harms is called a —
C. Niche
_____ 4. A tick that feeds on the blood of
of animals is a ----
D. Parasitism
_____ 5. A close, long-term relationship between
two or more species
E. Parasite
_____ 6. A symbiotic relationship where both
organisms benefit (are helped)
F. Symbiosis
_____ 7. A symbiotic relationship where
one organism benefits and the other is unaffected
G. Host
_____ 8. A symbiotic relationship where one
organism is hurt and the other is helped
H. Mutualism
Classify these examples of symbiosis as either commensalism, mutualism, and parasitism
1) Inside a human's intestine live bacteria that make vitamin K
2) Cowbird lays her eggs in the nest of another species of bird, removing one or two of the other birds
eggs
3)A human picks up bacteria on his or her hands. The bacteria do not cause disease but do feed on the
human's dead skin cells
4) A tick attaches itself to a human and feeds on the human's blood.
5) Honeybees get nectar from flowers and in return carry pollen to other flowers.
6) Moray eels are cleaned of parasites by cleaner shrimp.
7) Heart worm in dogs
8) M. leprae causes leprosy (Hansen's disease). It is an intracellular parasite, taking up residence in
Schwann cells where, in due course, it triggers an autoimmune attack on them that leads to their
destruction. The resulting loss of sensation makes it difficult to avoid injury to the extremities.
9) Crabs and Shrimps often form relationships with anemones in tropical waters, again for the
purposes of protection from predation. For instance the Anemone crab, Neopetrolisthes oshimai, which
is a filter feeding Porcelain crab, lives and captures its food from within the tentacles of giant
anemones.
10) The drawing shows the Nile crocodile opening its mouth to permit the Egyptian plover to feed on
any leeches attached to its gums.
11) Certain ants take a sweet liquid called honeydew from tiny insects called aphids. In
exchange for the honeydew, the ants protect the aphids from predators. What kind of
relationship is this? Explain your answer.