WorksheetsHunger Games - 7th Grade Science (Task #2)
Total questions: 10
Worksheet time: 23mins
Rosemary and Peter Grant of Princeton University have studied finches on the Galapagos Islands since 1973. They found that when drought conditions on the islands increased, the seeds produced by some of the plants that provided food for the finches were affected. The drought decreased the supply of plants that produced easily cracked seeds, but permitted the survival of plants that produced larger, tougher seeds. Only finches with strong, wide beaks could break open the tougher seeds. What can you conclude about the effect of drought on the natural selection of beak size and shape in finches from the Galapagos?
Over time drought caused average numbers of finches with stronger, wider beaks to increase.
When average rainfall decreased, the number of finches that consumed easily cracked seeds went up.
When average rainfall increased, the number of finches that consumed easily cracked seeds went down.
Drought caused average seed size and shape to decrease, which caused number of finches with stronger, wider beaks to increase.
Which would be the BEST reason why the proportion of birds with longer legs, in a population of shore birds, would increase over time?
competition for mates
separation from diving birds
selective breeding for the trait of longer legs
ability to wade in deeper water to capture prey
The patterns of interactions observed in three different ecosystems is shown. A student claims that there is a mutualistic relationship in one of the cycles. Which cycle shows a mutualistic relationship and which argument supports the student's claim?
Cycle 1, because the rabbit benefits from eating the grass, and the grass benefits from being fertilized and having the seeds spread.
Cycles 2 and 3 because all animals in both cycles are predator and prey at the same time.
Cycles 1, 2, and 3 because they all depend on each other for nutrients.
Cycle 3 because both animals are carnivorous.
You have been asked to provide evidence that a species of animal evolved from living in an aquatic environment to living in a terrestrial environment. Which statement provides the BEST evidence of how this species changed?
The species now has skin instead of scales.
The species now has gills instead of lungs.
The species now has feet instead of fins.
The species now has fur instead of skin.
Charles Darwin studied finches on the Galapagos Islands of the coast of South America. He noticed that they were slightly different from the finches in mainland countries in terms of their physical characteristics and diet. Which characteristic of the finch MOST LIKELY changed over many generations and why?
varying wing span; adapted for greater distances of flight
varying foot design; adapted to be on different surfaces
varying leg length; adapted to different depths of water
varying beak shape; adapted to different food sources
Two paramecia are shown. In order to determine the type of reproduction taking place, what would you need to know?
The date and classification of its last reproduction.
The orientation of the nuclei and the amount of genetic material in each nucleus.
The number of food vacuoles as well as the amounts and types of food contained within the vacuoles.
Whether the DNA in the nucleus of each paramecium is identical to or different from the DNA of the other paramecium.
A bee interacts with a flowering plant. What is the nature of this relationship and why?
This relationship is predator-prey because the flower’s pollen is used as food by the bee.
This relationship is parasitism because the bee uses the flower as a source of food, and the flower is harmed.
This relationship is mutualism because the flower’s pollen is carried to other flowers, and the bee gets nectar from the flower.
This relationship is commensalism because the plant’s production of seeds is helped by the bee, and the bee benefits from the flower’s scent.
Examine the following model of a food web. Which of these organisms are omnivores and how do you know?
Mice are omnivores because they eat grass and grasshoppers.
Sparrows are omnivores because they eat grasshoppers, which eat grass.
Hawks are omnivores because they eat more different organisms than any other organism in this web.
Frogs are omnivores because although they only eat one type of organism, two different organisms eat them.
Which cellular function(s) would be affected MOST if the nucleus did not work properly?
photosynthesis
cell division
the removal of wastes from the cell
the breakdown of sugar to provide energy for the cell
A student identifies the biotic and abiotic components of the model pictured. Which components identified in the model would be involved in the movement of matter?
A, D, and B
B, A, and D
D, C, and A
E, A, and B
