Grade 8 Life Science Science Quizz

During science class, a group of students went on a field trip to a nearby pond where they collected samples of pond water and pond plants. The students also looked at some prepared slides of human cheek cells. The students used a microscope to study cells in their samples. The results are shown in the following table.

Looking at the chart provided, the students need to develop a way to distinguish between plant and animal cells. Which of the following structures/organelles would be most useful to distinguish between a plant and an animal cell?

• cell membrane

• cell wall

• nucleus

• vacuole

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Structures within the human body are organized in a hierarchal arrangement where each structure performs a specific task. The diagram below shows the various levels of structures within the human body. A picture of which of the following structures belongs in the box above?

• cell

• organ system

• tissue

• organism

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-3

The multicellular human body is made up of several structures that work dependently with one another. Which structure functions as the basic unit of life?

• atom

• cell

• molecule

• tissue

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Michelle wants to classify an organism that she is studying in lab. The organism is multicellular, makes its own food, and is unable to move around its environment. Which of the following Domains can the organism that Michelle is studying most likely be classified into?

• Animalia

• Archaea

• Bacteria

• Eukarya

Many species of bird prey on Peppered moths. Light-colored moths blend into the lichen-covered oak trees in unpolluted areas. There was an increase in dark-colored moths because of the darkened woods caused by pollution in industrial areas. Since the 1960s, the United States has improved air quality and pollution around industrial centers has decreased. The result being that the white peppered moth is now much more prevalent than the black peppered moths. Which of the following explains why the black peppered moth is decreasing in number?

• a. adaptation

• b. evolution

• c. environmental factors

• d. natural selection

Tags

NGSS.MS-LS2-4

NGSS.MS-LS4-4

Robin’s teacher asked her to write a summary about diversity and evolution of living organisms. Robins paragraph is below. Individuals within populations exhibit some diversity. As a result of possessing slightly different traits, some individuals are better able to survive and reproduce than others. If these individuals ________________ changes in the characteristics of the population occur over time. The cumulative change in these characteristics is known as __________________.

• a. undergo adaptations, extinction

• b. are naturally selected for, evolution

• c. become extinct, evolution

• d. undergo evolution, extinction

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

In Drosophila melanogaster, commonly known as the fruit fly, the recessive eye color allele causes the flies to have very dark colored eyes. The dominant eye color allele causes the fruit flies to have normal red eyes. Two fruit flies are crossed and they produce several hundred offspring. Twenty-five percent of their offspring exhibit the dark eye color allele. Which of the following statements best describes the assumption that can be formulated about the parental generation?

• Both parents exhibit the recessive dark-eyed phenotype.

• Neither parent carries the recessive dark-eyed allele.

• Both parents carry the recessive dark-eyed allele.

• Only one parent carries the recessive dark-eyed allele.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Sam and Amy study food chains. Which of the following, according to the Law of Conservation of Energy, is true of a food chain?

• Energy that is lost cannot be replaced.

• Energy is lost as it moves through the food chain.

• The amount of energy in the food chain stays the same.

• The amount of energy in the food chain will change over time.

Tags

NGSS.MS-LS2-3

Green plants produce their own food during photosynthesis. This image shows the process of photosynthesis. Which of these substances is also a product of photosynthesis?

• carbon dioxide

• chlorophyll

• oxygen

• water

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Kristine exercises regularly. The process of cellular respiration makes it possible for Kristine to run on the treadmill and to lift weights. What do her cells do during cellular respiration?

• convert kinetic energy into chemical energy

• combine water and carbon dioxide to produce oxygen and food

• absorb light energy through the chlorophyll in their chloroplasts

• breakdown food molecules to release energy and carbon dioxide

Tags

NGSS.MS-LS1-7