Biology CP6 25-26 (S1)

Multicellular organisms contain organ systems. Which of the following BEST describes the organs in an organ system?

• The organs in an organ system are made up of similar cells.
• The organs in an organ system are made up of similar tissues.
• The organs in an organ system work together to perform a specific function.
• The organs in an organ system work together to perform all the functions a multicellular organism needs to maintain homeostasis.

Tags

BIO.3.e

The model shows how stem cells can specialize in a multicellular organism. What evidence does this model provide about cell specialization?

• Specialized cells retain the same structure and function as the stem cell. Each specialized cell type has a specific structure that helps in performing a specific function.
• Specialized cells have a unique structure and function from that that of the stem cell. In multicellular organisms, cells have specialized shapes that enable them to perform specific functions in an organism.
• Specialized cells can change back into stem cells and retain the same structure and function. The specialized cell arises from a single cell (stem cell) which have different structures and to perform different functions.
• Specialized cells can change back into stem cells with a new structure and function. The specialized cell arises from a single cell (stem cell) to have different structure and to perform different functions.

Tags

NGSS.HS-LS1-2

NGSS.HS-LS1-4

Which of the following structures are typically present in both plant and animal cells?

• cell walls
• centrioles
• chloroplasts
• mitochondria

Tags

BIO.3.b

BIO.3.e

Use the information in the graph to answer the question below. What is a conclusion that can be drawn based on the data in the graph?

• Exercise does not have an impact on activity of the body systems because over the course of 50 minutes there was no change in the heart rate of the individual.
• The individual's heart rate will never exceed 100 beats per minute due to limitations of the heart's structure.
• The individual's heart rate was highest at 40 minutes because the body needs the most oxygen and energy after exercise has stopped.
• The individual's heart rate began to increase at the onset of exercise due to an increased need for oxygen and energy to be circulated through the body by the heart.

Tags

BIO.3.b

Which statement BEST describes the primary role of perspiration in humans?

• Perspiration rids the body of excess water.
• Perspiration eliminates bacteria from the skin.
• Perspiration opens skin pores to absorb more oxygen.
• Perspiration helps to maintain a stable body temperature.

Tags

BIO.3.b

Which statement explains how unicellular organisms are able to survive without specialized cells?

• A unicellular organism conducts all life processes by the division of labor.
• A unicellular organism conducts all life processes with the help of its environment.
• A unicellular organism conducts all life processes with the help of other organisms.
• A unicellular organism conducts all life processes by itself.

Tags

BIO.3.b

Myosin is plentiful in muscle cells, but is not found at all in lens cells. Lens cells contain large amounts of crystallins, which are not found in muscle cells. Why do some proteins appear in one type of cell but not in another?

• During differentiation, certain genes are added to cells to produce proteins that enable specific functions.
• During differentiation, certain genes are activated to produce proteins that enable specific functions.
• Differentiated cells produce all proteins but destroy the proteins they do not use.
• Differentiated cells release unused proteins into the blood for other cells to use.

Tags

BIO.3.e

In the heart there is a group of specialized cells that regulates the frequency of the heartbeat. During strenuous exercise, the group of cells will MOST likely

• cause the arteries to expand.
• decrease the heart rate.
• increase the heart rate.
• send fewer signals.

Tags

BIO.3.b

Which of the cells is most likely to be a plant cell?

• Cell 1
• Cell 2

Tags

BIO.3.e

How can the speed of a chemical reaction be increased?

• Equally increase the amount of the reactants in the reaction
• Change the reaction to a basic solution by adding vinegar
• Add enzymes to lower the activation energy
• Remove the phospholipids from the reaction

Tags

BIO.2.c