H.Bio Homostastis test Review F25

On a cellular level, homeostasis is maintained in all organisms through the action of which cell structure?

• endoplasmic reticulum

• cell wall

• cell membrane

• cytoplasm

Tags

NGSS.MS-LS1-2

What would probably happen if you placed a saltwater unicellular organism in freshwater?

• It would soon adapt to the freshwater.

• It would shrink.

• It would swell.

• It would not be affected.

When a cell is placed in a hypotonic solution, the cell will

• shrink due to losing water.

• swell due to gaining water

• stay the same size

• shrink due to gaining water.

A cell containing 10% salt is placed in a water environment containing 20% salt. Which of the following will occur?

• Some water will move from cell to the environment

• Some water will move from the environment to the cell

• Water will remain concentrated in the cell

• All of the water will move into the environment

Tags

NGSS.MS-LS2-3

The pH of the ocean has historically been 8.2, but has been altered in some locations due to acidification. Which pH below would best represent an acidified ocean?

• 13.3

• 8.7

• 8.1

• 9.6

Tags

NGSS.MS-PS1-2

Which part of the sea urchin produces sex cells?

• Gonads

• Spines

• Nerve ring

• Aristotle's lantern

Tags

NGSS.MS-LS3-2

Which of the following traits would not be useful to the study of the genetic variation in a population of urchins?

• the length of the urchin

• the color of the urchin

• the spine size of the urchin

• the food available to the urchin

Tags

NGSS.MS-LS4-4

When observing urchins, the scientist noted that the urchins varied in color from light to medium to dark. This observation is known as.

• Quantitative

• Qualitative

• Hypothesis

• Quantum

In the nitrogen cycle, nitrogen is continuously recycled. Which types of organisms break down nitrogen compounds in dead organisms and recycle them into the soil?

• Heterotrophs

• Bacteria

• Green plants

• Herbivores

Tags

NGSS.MS-LS2-3

The diagram to the right shows a simplified nitrogen cycle. Which process is responsible for returning nitrogen to the air?

• Excretion

• Decomposition

• Photosynthesis

• Nitrification

Tags

NGSS.MS-LS2-3