LMS 7th Grade Science Final Review

Abigail is studying a new species of fern. She takes DNA samples of the fern and it's offspring.  Her samples indicate that the offspring's DNA is identical to the parent.  Which statement is true about this species of fern?

• The fern reproduces sexually, and it requires a mate.
• The fern reproduces asexually, and it requires a mate.
• The fern reproduces sexually, and it does not require a mate.
• The fern reproduces asexually, and it does not require a mate.

What is a way to increase the energy of a wave?

• Increase the amplitude of the wave
• Increase the frequency of the wave
• Neither of these will increase the energy of the wave
• Both of these will increase the energy of the wave

Rabbits that are bred as pets come in many colors, such as white, spotted, and black.  Wild rabbits are almost always grey or tan. Why is the color of the wild rabbits considered an adaptation?

• The colors help them find mates
• The colors help them find food
• The colors help them hide from predators by blending in
• The colors make them more likely to be protected by humans

Which of these is the correct example of a fossil?

• an igneous rock
• a cave drawing depicting extinct animals
• a decomposing organism that recently died
• the preserved remains of an insect trapped in amber

Lilly is learning about the difference between traits that are inherited and traits that are learned.  She knows that her ability to paint is learned, and her green eyes are inherited.  How does a person inherit traits such as eye color?

• through the mitochondria in their cells
• through DNA that is passed from parents to offspring
• through bacteria that are passed from parents to offspring
• through proteins that are passed from parents to offspring

What material is responsible for the storing of genetic information in organisms?

• proteins in the cell membrane
• chromosomes that are made of DNA
• cytoplasm
• golgi bodies

In dogs, solid fur color is dominant to spotted fur.  Greg's dog has solid fur, but it's two brothers have spotted fur.  If the allele for solid fur is (F) and the allele for spotted fur is (f), which of the following could be the genotypes of Greg's dog's parents?

• FF and Ff
• Ff and ff
• ff and ff
• FF and FF

Which statement is the most likely explanation for why the mouse population has changed over time?

• The white mice are getting eaten because they taste better
• The white mice are reproducing better than the dark mice
• The white mice are getting eaten because they are slower
• The white mice are getting eaten because the hawks can see them more easily

There are two populations of rabbits, ones that run fast and those that run slow.  After 5 years, there are many more fast rabbits than there are slow rabbits.  What is the most likely explanation for the change in population?

• The slower rabbits were unable to get enough to eat
• The slower rabbits were more likely to be eaten by predators
• The slower rabbits caught a disease that affected them more severely than the fast rabbits
• The slower rabbits were less likely to find a mate

Victor is investigating sound waves.  He takes an alarm clock, places it in a jar, and uses a food vacuum to remove all of the air from the jar. When the alarm goes off, Victor cannot hear the sound. Why?

• There are no air particles, and sound waves need a medium in order to travel.
• The jar is absorbing all of the sound waves.
• The vacuum is absorbing all of the sound waves.
• The lid
   of the jar bounces the sound wave back into the jar.