7th Grade Pre-AP Test

A diagram of a plant cell is shown. The function of the plant cell structure shown in the enlargement is to —  

• provide support for the cell 
• direct all the cell’s activities
• use energy from sunlight to make sugar 
• regulate substances that enter and exit the cell 

Tags

NGSS.MS-LS1-2

Eukaryotes are classified into four kingdoms according to certain characteristics. The diagram shows some characteristics of the four kingdoms. Which of these is the plant kingdom?

• Kingdom 1
• Kingdom 2
• Kingdom 3
• Kingdom 4

Loriciferans are microscopic multicellular animals that live in various marine sediments. Scientists have discovered genera of Loriciferans in a deep-sea habitat that lacks oxygen. Before this discovery, some prokaryotes and some unicellular eukaryotes were known to inhabit anaerobic environments. Among the newly discovered Loriciferans is Spinoloricus sp. nov., which is pictured. Scientists determined that organisms of the genus Spinoloricus were eukaryotes and not prokaryotes because Spinoloricus cells have —

• flagella
• hereditary material  
• cell walls  
•  nuclear membranes  

Tags

NGSS.MS-LS1-1

In the process of deamination, the liver converts amino acids to compounds that can be used in energy metabolism. The liver removes the amino groups from amino acids to produce urea. Then the urea is removed from the body as urine. During this process, the liver works in conjunction with which body system? 

• Endocrine
• Excretory
• Nervous
• Respiratory

Genetic variation can aid in the survival of species when the environment changes. Which of the following is the best example of an organism with a genetic variation that could improve survival chances over time? 

• An ant that is resistant to pesticide
• A wasp that is infected with parasites 
•  A cactus that has no spines 
• A mouse that has learned to avoid mousetraps  

Tags

NGSS.MS-LS4-4

An ocean food chain is shown in the diagram above. Which organism represents the trophic level containing approximately 1% of the initial amount of solar energy acquired by the phytoplankton? 

• Copepods 
• Sand eels
• Herring
• Humans 

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Surtsey is an island located south of Iceland. The island was formed by a volcanic eruption and first appeared in 1963. The table below contains descriptions of changes in the population and diversity of species on Surtsey. Which of these lists the descriptions in the correct order of ecological succession on Surtsey?

• I, II, IV, III
•  III, I, II, IV
•  IV, III, I, II
• II, IV, I, III

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The overgrowth of algae poses a major problem for coral reefs. Intensive fishing is one factor that contributes to algae overgrowth because it does which of the following?

• Allows more sunlight to be available to algae
•  Inhibits the spread of pathogens in algae colonies
•  Reduces the number of organisms that feed on algae
• Increases the competition between different algae species

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following are missing from the food web shown?

• Producers
•  Decomposers
• Omnivores
• Predators

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which of the following correctly describes an interaction that occurs between two body systems of a rabbit that helps the rabbit outrun a pursuing coyote?

• The skeletal system releases additional calcium, and the circulatory system retains more sodium in the blood to provide muscles with ions for contraction.
• The digestive system increases the rate of digestion, and the excretory system ceases to provide tissues with more nutrients.
•  The respiratory system increases the breathing rate, and the circulatory system increases blood pressure to provide tissues with more oxygen.
• The endocrine system releases hormones that prepare the immune system to deal with possible injuries.