Edusmart: Variations and Natural Selection 2024

Which 3 of the following are reasons organisms migrate? 

Pick 3.

• To reproduce
• To get more food
• To avoid being eaten by a predator

• To find a better (more suitable) climate

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The graph shows how the population of spiders in one habitat changed over the last 60 years. Based on the data presented in the graph, what can you infer about the population of spiders?

• All the tan spiders were eaten by other insects.
• The green spiders are best suited for the habitat.
• The yellow spiders are best suited for the habitat.
• The brown spiders cannot find enough food to eat.

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Why do organisms have to compete for resources? 

• Habitats overlap
• There are too many resources
•  Animals like competition
• Organisms do not have to compete for resources

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The Venn diagram compares and contrasts migration and hibernation. What can you conclude, based on the diagram?

• Both are a response to change in environment.
• Migration and hibernation require organisms to move.
• A lot of energy is required for migration and hibernation.
• The only response to a change in the environment is hibernation.

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Which statement BEST describes how hibernation enhances a ground squirrel’s chance of survival?

• During hibernation, the ground squirrel’s heart rate speeds up to warm its body.
• Hibernation causes the ground squirrel to die but come back to life when the weather gets warm again.
• During hibernation, the ground squirrel moves to a warmer climate and doesn’t return until it gets warm again.
• Hibernation slows the ground squirrel’s body processes down so it uses less energy during the cold months when food is scarce.

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Which of the following is an example of the

process of natural selection ?

(The others are adaptations that are a result of natural selection.)

• Hummingbirds flying from flower to flower as they are drinking nectar from a plant.
• Whales and dolphins swimming to the water’s surface to breathe air, because the have lungs instead of gills
• Sloths making their homes high in trees to try to protect themselves from predators. 
• Brown-colored lizards surviving and reproducing because they are better able to camouflage themselves from predators. 

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What do you think would MOST LIKELY happen if a particular species only came in one size, and its predators all ate that one size? 

• The predators would grow bored of eating the same thing and start to eat each other 
• The species would become extinct (all die) because they would all get eaten
• The species would reproduce quickly
• All predators would become extinct (all die). 

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A gradual change in a trait over time that enables a species to better survive in its environment is a(n) __________. 
(It is a result of natural selection.)

• adaptation
• habitat (home) 
• population 
• competition

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Which of the following statements about variations in species or populations is TRUE? 

• Variations help species and populations survive.
• All organisms in a population have the same exact traits
• Physical variations are the only traits that help species or populations survive.
• Behavior variations are the only traits that help species or populations survive.

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Which is a chemical process where  organisms produce light?

• Bioluminescence 
• Hibernation 
• Migration 
• Luminary