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The Octopus Scientists Assesment

Which of the following is false about octopods? There may be more than one correct answer.
They are distant relatives of snails
Their blood is blue because it uses cobalt instead of the iron found in red blood
They change color in accordance with temperature
They often drill holes into shells they can't open
They possess a tongue with a ribbon of teeth
Which of the following is true about octopods? There may be more than one correct answer
They decorate their homes with shells and rocks
Their brains are the size of tennis balls
They can inject venom into a clam with their tongues
They occasionally eat birds
Each ocopus has a distinct personality
Why is Moorea a hotbed of research?
It has been undisturbed for millions of years, allowing the reefs to grow in peace in their natural state
A series of disasters nearly destroyed the reefs there, sparking interest in how reefs respond to such threats.
The octopus species found there, octopus cynea, is exclusive to that part of the world.
The indigenous people are of interest to anthropologists.
It is not a hotbed of research.
What kind of evidence did the scientists collect for their experiments? There may be more than one correct answer.
A personality test for each octopus they encountered.
Octopods which they took home with them.
Living species which are usually preyed upon by octopods.
Various food bits found at or around octopus dens.
Chromatophore DNA from octopods.
True or False, octopods are color-blind.
True
False
Chromatophores are the type of cells which an octopus uses to change color. While not present in most ocopods, cyanophores are also a type of chromatophore which are responsible for almost all vibrant blue colors in nature. Which of the following animals would have cyanophores?
A crocodile
A great white shark
A dog
A peacock
A moray eel
In chemistry copper and cobalt are often used to produce blue liquids. What could produce a red liquid?
Calcium
Cyanide
Iron
Titanium
Nitrogen
The early earth's atmosphere contained very little oxygen (chemical formula O2) and was covered mostly in water (chemical formula H2O). In addition to this, a vast band of iron ore encompassed the planet. Would the planet have been red?
Yes
No
A scientist wants to perform an experiment to determine if the waters of Moorea are more dangerous for an octopus than the waters in Hawaii. What observation(s) may he have made before deciding to do this experiment?
There are more octopods in Hawaii than in Moorea
Octopods in Hawaii are friendlier than octopods in Moorea
Octopods in Moorea eat "on the go" more than octopods in Hawaii.
All of the above
A scientist wants to perform an experiment to determine if the waters of Moorea are more dangerous for an octopus than the waters in Hawaii. What hypothesis may he have?
Moorea is more dangerous than Hawaii for an octopus because there are more natural predators in Moorea.
If Moorea is more dangerous for an octopus than Hawaii, then octopods in Hawaii will be red all the time.
Because Moorea has deeper waters than Hawaii, it is more dangerous for an octopus.
If Moorea is more dangerous for an octopus than Hawaii, then an octopus in Hawaii will eat more birds.
Moorea is more dangerous than Hawaii for an Octopus because it is hotter.
A scientist wants to perform an experiment to determine if the waters of Moorea are more dangerous for an octopus than the waters in Hawaii. Which of the following is an independent variable that this experiment might have?
The kind of food the octopods in each location is eating
The temperature of the octopus's habitat
What time of day the octopods in each location typically come out to hunt.
The location of the octopods being studied.
None, the experiment is uncontrollable.
A scientist wants to perform an experiment to determine if the waters of Moorea are more dangerous for an octopus than the waters in Hawaii. Which of the following is a dependent variable that this experiment might have?
The kind of food the octopods in each location is eating
The temperature of each octopus's body
What time of day the octopods in each location typically come out to hunt.
The location of the octopods being studied.
None, the experiment is uncontrollable.
A scientist wants to perform an experiment to determine if the waters of Moorea are more dangerous for an octopus than the waters in Hawaii. True or false, there is a control group in this experiment.
True
False
A scientist wants to perform an experiment to determine if the waters of Moorea are more dangerous for an octopus than the waters in Hawaii. Which of the following is a control the experiment might have.
The species of octopus being studied
The number of natural predators an octopus has in each location
The pen used to record results
The kind of reef octopods in each location like to inhabit.
0
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