Which is a primary function of a vacuole in a cell?

What determines the function of a specialized cell?

This diagram shows a red blood cell in a beaker that contains a solution with a higher salt concentration than that inside the red blood cell. What will happen to the red blood cell in this environment?

During which phase of the cell cycle does most cell growth occur?

This diagram represents a closed terrarium exposed to sunlight.What must happen for the carbon cycle to continue in this terrarium?

and sounds?

What will most likely occur if the population of the world continues to increase at predicted rates?

What will most likely happen if a nonnative species is introduced into a stable ecosystem?

Why must DNA replication have to occur before a cell can divide by mitosis?

Which mRNA sequence is produced from this DNA section?

Which process can occur in both mitosis and meiosis?

How do some chemicals increase the risk of a person getting cancer?

What is the difference between the DNA of a dog and the DNA of a fly?

Which would be a desirable trait scientists may want to create in a transgenic plant?

Which substance do biochemists often search for in fossils to help better understand the evolutionary relationships of the organism that formed the fossil?

Scientists believe that the polar bear in Alaska and the brown bear in Russia evolved from a common ancestor. Which would be responsible for this evolutionary change?

What is the basis for the earliest classification system of organisms?

Waxes create a waterproof layer on the outside of some living organisms. To which group of organic molecules do waxes belong?

Which best summarizes the role of DNA in the production of proteins?

A student noticed that the freshwater plant, Elodea, produced bubbles when placed in direct light. What could the student most likely conclude?

Plant cells are able to produce their own food. This process happens in which structure?

These diagrams show a variety of cells from the same organism. How can cells from the same organism have such different shapes and functions?

Which statement best explains how sweating during exercise maintains homeostasis?

The chemical colchicine disrupts cell division. Which cell process would most likely stop if colchicine were added to a culture of human liver cells?

Which statement best explains why animals are considered heterotrophic?

In some ecosystems, wolves have been eliminated due to their threats to humans. How can the reintroduction of wolves benefit the ecosystem?

What will most likely be the result as humans move into new areas, forests are clear cut and housing developments are built?

What activity most contributes to the depletion of the ozone layer?

Which effect could a mutation in mRNA have on the production of proteins?

What carries the instructions for making amino acids in a protein?

How are mitosis and meiosis similar?

Genetically identical plants will produce either pink flowers or blue flowers, depending on the type of soil in which they are planted. What is most likely the explanation for the differences in flower color?

This diagram shows DNA fingerprints for a child and four adults. Which adult is most likely a parent of the child?

Which transgenic organism has been used to clean up oil spills?

An antibiotic which was effective 20 years ago against a specific type of bacterial infection no longer works against the same kind of infection today. Which best explains why the antibiotic is no longer as effective as it was 20 years ago?

An insecticide kills most of the ants on a plant. Over time, it is determined that the insecticide is not as effective for killing ants. Which statement best explains this observation?

Multicellular eukaryotic autotrophs belong to which kingdom?

Salivary amylase is an enzyme in humans that breaks down starches. What substance would humans have difficulty digesting without this enzyme?

Which best explains why the rate of a biochemical reaction decreases at high temperatures?

A contractile vacuole helps protists eliminate excess liquid. This is a "pumping" process which reduces pressure inside the cell and prevents the cell from bursting. What is most likely the source of energy for this process?

What do both prokaryotic and eukaryotic cells contain?

Which of these cells in the human body is specialized to transport oxygen throughout the body?

What would most likely be produced when a cell with eight chromosomes undergoes mitosis?

This diagram shows a Paramecium, a unicellular protist. When a chemical is added to the pond water in which the Paramecium lives, the Paramecium stops moving. Which structure is most likely affected?

Which adaptation do ferns, gymnosperms, and angiosperms have that mosses do not have?

Which graph best illustrates the growth of a population introduced into an environment with limited resources?

Which will most likely result in a negative growth rate in the human population of a country?

Why are many farmers encouraged to plant different types of crops on the same land throughout the year?

During translation, what does the tRNA deliver to the ribosomes?

Which will most likely cause an increase in the frequency of genetic mutations in humans?

Having freckles is dominant over not having freckles. If two individuals heterozygous for freckles have a child, what is the probability the child will have freckles?

Identical twin girls are separated at birth and cared for by two different families. After twenty years, the twins have different heights and weights. What is most likely the cause of these differences?

What is the function of a restriction enzyme?

Some marine worms and mollusks go through similar larval stages during development. Which can be inferred about their relationship?

Which statement best describes natural selection?

Some scientists claim recent evidence suggests birds should be reclassified to share more taxonomic groups with dinosaurs. What type of evidence would provide the best support for this claim?

This is a dichotomous key for selected arthropods. To which order does the caddis fly belong?

Which molecules are joined together to make proteins?

Which word equation best represents the process of cellular respiration?

How does the body of a runner keep up with the demand for energy when cellular oxygen levels are low?