Biology STAAR 2021 RC4

When the skin comes in contact with an irritant, receptors in the skin send signals to the spinal cord. The signal is then sent to the brain for processing, and the individual begins to scratch the affected area. Which two systems are most likely interacting when a person experiences itching caused by a skin irritant?

• Circulatory and excretory

• Integumentary and nervous

• Digestive and muscular

• Respiratory and lymphatic

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B.10(A)

Which graphic organizer best compares the energy inputs and outputs of cellular respiration and photosynthesis?

• 
• 
• 
• 

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B.9(B)

Which statements best compare the function of an ATP molecule to a DNA molecule?

• ATP carries and transmits the genetic information of organisms. DNA serves as a biological catalyst that speeds up the rate of chemical reactions.

• ATP provides energy for chemical reactions in the cell. DNA carries and transmits the genetic information of organisms.

• ATP serves as a biological catalyst that speeds up the rate of chemical reactions. DNA acts as a structural sugar in the cell walls of plants.

• ATP acts as a structural sugar in the cell walls of plants. DNA provides energy for chemical reactions in the cell.

Tags

B.9(A)

For an enzyme to be able to catalyze a reaction, the active site must —

• be occupied by an inhibitor

• increase the activation energy level

• have a complementary shape to the substrate

• cause the enzyme to be destroyed in the reaction

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B.9(C)

A flower that has both male and female reproductive structures is shown.

Which statement best describes an interaction that will allow a flowering plant to reproduce by self-pollination?An anther is transferred from a filament to another filament within the same flower.

• An anther is transferred from a filament to another filament within the same flower.

• An ovule is transferred from the ovary to a petal on a different flower.

• H A pollen grain is transferred from an anther to the stigma of the same flower.

• An ovary is transferred from a flower on one plant to a flower on a different plant.

Tags

B.10(B)

Breaking down food for nutrients involves many body systems. A student made a partial list of the processes that occur.

Which body systems interact most directly in the three listed processes?

• Digestive, Integumentary, Muscular

• Excretory, Immune, Muscular

• Circulatory, Excretory, immune

• Circulatory, DIgestive, Endocrine

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B.10(A)

A student makes a Venn diagram to compare the functions of carbohydrates and lipids

Which cellular function of carbohydrates and lipids should be placed in the shared section of the Venn diagram?

• Hormone production

• Structural support of cell walls

• Energy storage

• Catalyst for chemical reactions

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B.9(A)

Students construct a graphic organizer to illustrate the different levels of biological organization.

Which term does the letter X represent in the graphic organizer?

• Cell

• Organism

• Ecosystems

• Biosphere

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B.10(C)

Students set up a controlled experiment by growing the same type of seedlings in two different locations. After a period of time, the students observed the seedlings and recorded their observations in the table shown

What caused the shoots of the seedlings on the windowsill to bend toward the window?

• Hormones produced in response to a light stimulus

• Sugars produced in response to a gravity stimulus

• Carbon dioxide produced in response to a water stimulus

• Water produced in response to a nitrogen stimulus

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B.10(B)

The hormone adrenaline causes blood vessels to contract and send more blood to major muscles.

• The hormone adrenaline causes blood vessels to contract and send more blood to major muscles.

• Metabolic wastes generated by muscle cells are eliminated in urine.

• The diaphragm contracts causing the chest cavity to expand, which draws air into the lungs.

• Nutrients absorbed in the small intestine are transported in blood to the brain.

Tags

B.10(A)