19 questions
Which cellular organelle modifies fatty acids?
Chloroplast
Mitochondrion
Golgi Complex
Endoplasmic Reticulum
Which energy transformation occurs during active transportation in a cell?
light energy to chemical energy
kinetic energy to potential energy
chemical energy to mechanical energy
mechanical energy to electrical energy
A student wrote the following claim on a homework assignment: " Eukaryotic cells need more lipids than prokaryotic cells." Which statement below provides the BEST support for her claim?
Eukaryotic cells have a nucleus.
Eukaryotic cells make up multicellular organisms.
Eukaryotic cells contain membrane-bound nucleus.
Eukaryotic cells perform cellular respiration.
Sugars are necessary for human cell function. Which of the following are human cells NOT capable of doing?
attaching sugars to protein molecules
building larger molecules from sugars
creating simple sugars from smaller molecules
breaking down complex carbohydrates into simple sugars
A lion and a crocodile are both large animals, but a lion has to eat much more than a crocodile of the same mass to survive. Which statement BEST explains the difference?
The crocodile eats a larger prey than the lion can.
The lion can store much more food than the crocodile can.
The crocodile uses its food more efficiently than the lion does.
The lion has to generate thermal energy and the crocodile does not.
How are plant cells and human cells the same?
They can produce their own oxygen.
They make their own food from sunlight.
They can receive nutrients through the cell wall.
They use mitochondria to release energy from sugars.
Which two statements below are true for plants cells and FALSE for animal cells?
1 and 2
2 and 3
3 and 4
4 and 1
Scientists dug through three layers of rock and found many rabbit fossils. The fossils were complete enough to determine the length of the rabbits' hind feet. Consider the data below.
Rock Layer Range of Hind Foot Length
top 6.25 to 7.5 cm
middle 3.25 to 6.5 cm
bottom 2.5 to 3.75 cm
Which conclusion is BEST supported by the data?
Over time, rabbits that had shorter feet lived longer than rabbits that had longer feet.
Over time, rabbits that had longer feet lived longer than rabbits that had shorter feet.
Over time, rabbits that had shorter feet had more offspring than rabbits that had longer feet.
Over time, rabbits that had longer feet had more offspring than rabbits that had shorter feet.
Scientists studied the taxonomic relationship between two lizard species living on the sides of a canyon. One species had a long toes and one had short toes, but they were alike in most other ways. See below what the scientists found.
canyon's sunny side canyon's shady side
Living long-toed lizard YES NO
Fossils of long-toed lizards YES YES
Living short-toed lizard NO YES
Fossils of short-toed lizards NO NO
Short-toed lizards evolved from long-toed lizards on the shady side of the canyon.
Short-toed lizards evolved from long-toed lizards on the sunny side of the canyon.
Long-toed lizards evolved from short-toed lizards on the shady side of the canyon.
Long-toed lizards evolved from long-toed lizards on the sunny side of the canyon.
Which of these characteristics BEST helps scientists classify organisms?
size
color
gender
structure
The scientific name for a giraffe is Giraffa camelopardalis. What two levels of classification does this name represent?
family and order
kingdom and genus
phylum and domain
genus and species
How are organisms classified as Eukarya different from organisms classified as Archaea and BActeria?
They are multicellular
They all reproduce sexually
They all produce their own food
They all have membrane-bound nuclei
Organisms can be separated by their MOST basic characteristics into the broadest groups known as
kingdoms
domains
phyla
order
Charles Darwin made famous observations of finches on islands in the Pacific Ocean. The birds were believed to have come all from one population, but when separated on the islands with differing habitats, the birds changed.The beaks of the birds on islands with lots of seeds were different from the beaks of the birds on islands with lots of insects. How did their beaks come to match the food in their environment so well?
The birds migrated to the island with the right food supply for their beaks.
The food supply on the islands changed to match the birds' beaks.
The predators on the islands eliminated the birds with the "wrong" beaks.
The birds with the "right" beaks for the food supply had more young.
A strawberry farmer finds that, after a hard freeze, some of his strawberries are still alive. Which best explains why these strawberries were able to survive?
They have larger leaves to protect the fruit than the other strawberries.
They have different genetic variations that cause them to be more resistant to cold temperatures.
They are able to reproduce more quickly than the other strawberries.
The color of the strawberries is darker, and they maintain their temperature better than other strawberries.
In the winter, the fur of the arctic fox is white. in summer, the fur darkens to a reddish brown. What most likely causes the fur of the fox to change color?
the amount of sunlight present
the fox's habitat
the fox's genes
the fox's age
A low- level species in a food web suddenly becomes extinct. Of its predators, which will most likely survive?
the predators that are genetically similar
the predators that feed on many different organisms
the predators that primarily feed on the now-extinct species
Some peacocks are born with a genetic variation that makes them completely white. How does this affect the likelihood of their survival?
Genetic variation in the white peacock makes it stand out in a crowd as a target for potential predators, resulting in fewer white peacocks.
Genetic variation in the white peacock makes it stand out in a crowd and scares potential predators, resulting in more white peacocks.
Genetic variation in the white peacock makes it more attractive to mates, resulting in more white peacocks.
Which is most likely the result of genetic variation in organisms?
Mothers give birth to identical twins
A virus wipes out an entire field of crops
Some bacteria survive when exposed to antibiotic