Quarter 1 Review

Which two features best define a nematode as a living thing?

• The nematode body is made entirely of cells.

• The nematode body has carbon and oxygen throughout its body.

• The nematode can respond to stimuli and move away.

• The nematode can be found in soil or water.

• The nematode has DNA as its genetic code.

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-8

A student performs an experiment to study the changes over 7 days between two different subjects in a glass enclosure with water and a rock partly in and out of the water. The observations and data are in the tables. Which summary is best supported by the data?

• Subject 1 is a living thing because it remains brown the entire time, and its surface temperature changes over the course of the experiment.

• Subject 1 is a living thing because it can float in water, and it has crickets crawling on top of it over the course of the experiment.

• Subject 2 is a living thing because it remains green the entire time, and it changes temperature over the course of the experiment.

• Subject 2 is a living thing because it moves under a rock when the glass is tapped, and it feeds on the crickets over the course of the experiment.

Tags

NGSS.HS-LS2-3

The model shows a virus that commonly infects bacteria. Which observation indicates the virus is nonliving?

• The virus has genetic material.

• The virus has a protective outer layer.

• The virus contains proteins.

• The virus lacks cellular organelles.

The diagram compares a virus and a bacterial cell. 

Which statement explains why viruses depend on bacterial cells?

•  The chromosomes are needed to transmit the viral genetic material.

• The ribosomes are needed to synthesize the viral proteins from the viral genetic material.

• The cytoplasm is needed so that the genetic material can move from one site to another.

• The cell wall is needed to protect the genetic material from environmental damage.

Which two organelles when present help identify a cell as a plant cell instead of an animal cell?

• cell wall

• chloroplasts

• mitochondria

• nucleus

• ribosomes

Tags

NGSS.HS-LS1-5

The model shows differentiation of stem cells with activated genes (+) and repressed genes (-) for three different cell types. Which statement explains the model?

• All cells with the same active gene are identical to one another.

• The cells with the same repressed gene will be identical to one another.

• As the stem cell is differentiating, the genes will activate one at a time to produce a new cell.

• As different genes are activated or repressed, a cell will form with different characteristics.

Tags

NGSS.HS-LS1-4

The table lists if a cellular feature is present in a liver cell and a neuron. Which conclusion is supported by the table?

• The neuron is able to produce energy, while the liver cell cannot.

• The neuron is able to store nutrients, while the liver cell cannot.

• The liver cell is able to divide, while the neuron cannot.

• The liver cell is able to produce proteins, while the neuron cannot.

The diagrams show a skin cell at two different points in its life cycle. As a skin cell ages, it moves from a lower tissue layer deep in the body to the upper and outermost tissue layer on the body. 

Which statement best describes the difference between the lower and upper skin cells?

• The lower skin cell lacks genetic information as it has a defined nucleus.

• The lower skin cell is unable to produce proteins because of the presence of mitochondria.

• The upper skin cell produces more energy as it has more space inside the cell membrane.

• 1. The upper skin cell is unable to divide since it lacks any organelles.

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

A student compares a skin cell from the upper layer of skin to one from a deeper layer of the skin. The student observes that the upper skin cell has no organelles and is thinner than the skin cell from the deeper layer. Why is the difference in skin cell structures an important feature for the function of skin?

• Skin cells deeper in the body are in contact with more organs and do not replicate to allow the surface to stay in place.

• Skin cells need to divide actively at the uppermost layer to cover the large surface area of a person’s body.

• Skin cells in the upper layer of skin are lost easily and do not perform cellular activities for the body like skin cells in deeper layers.

• Skin cells in the upper layer of skin require more energy to remain on the body and need a hollow cavity to store nutrients, unlike skin cells in deeper layers.

Tags

NGSS.HS-LS1-4

The table compares a tenocyte, a cell that makes up a tendon, with a muscle cell. Which claim is supported by the data?

• The muscle cell produces much more energy than the tenocyte.

• The muscle cell can hold more genetic information than the tenocyte.

• The muscle cell produces fewer sugars than the tenocyte.

• The muscle cell can store fewer molecules than the tenocyte.

Tags

NGSS.HS-LS1-7