The diagram shown represents the input and output of a process performed by the chloroplast of a cell. Which substance is most likely represented by "Y"?

• Glucose

• CO2

• ATP

• Light

Tags

NGSS.HS-LS1-5

After 24 hours, the amount of gas that accumulated at the top of the inverted test tube is measured. The students conclude that the light source is causing the water to evaporate, causing water vapor to fill the top of the tube. The best alternative explanation of the differences between the setups is that the

• gravity increased the downward flow of the trapped water

• metabolism of the elodea plants absorbed CO2 from the water

• heat from the light source caused the escape of dissolved gas

• light caused the elodea plants to photosynthesize, releasing O2 gas.

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

The picture shows a student’s experiment with Elodea, a common aquatic plant. Which change in this experiment is most likely to increase the volume of oxygen gas that accumulates in the top of the tube?

• use fewer plants

• replace the beaker with a larger container

• move the light source closer to the beaker

• reduce the amount of water

Tags

NGSS.HS-LS1-5

A student observes that a type of eubacteria contains chlorophyll. Which of these does this type of bacteria have in common with plants?

• It is photosynthetic

• it contains vascular tissue

• it contains mitochondria

• it is heterotropic

Tags

NGSS.MS-LS1-6

One strand of DNA could be as long as a football field if it were stretched out lengthwise. One of the factors allowing DNA to fit inside the nucleus of a cell is its ability to

• denature from the effect of an enzyme

• break apart into separate genes

• extend to form very long, thin molecules

• coil tightly around associated proteins

A chart of human chromosome pairs is called a karyotype. What information is revealed in the karyotype above?

• Gene dominance

• Age

• Sex

• Down Syndrome (Trisomy 21)

Tags

NGSS.HS-LS3-1

The picture shows a segment of DNA from a cat. Which of these is most likely the kitten of this cat?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-LS3-1

The DNA fingerprints were made from blood samples taken from a puppy and four possible sires of this puppy in an effort to determine the puppy’s pedigree. According to this information, which sire was probably the father of this puppy?

• A

• B

• C

• D

Tags

NGSS.HS-LS3-1

In order to form recombinant DNA, scientists have found a way to cut a DNA segment using an enzyme named EcoRI. This enzyme cuts DNA wherever the sequence C-T-T-A-A-G occurs between the A and the G base. Which of these would result if EcoRI were used on the DNA in the diagram to the right?

• A

• B

• C

• D

Tags

NGSS.HS-LS1-1

Which of the following processes occurs during Prophase I of Meiosis I and results in the exchange of genetic material between homologous chromosomes?

• DNA replication

• Cytokinesis

• Crossing Over

• Chromosome alignment in the middle (the equator)