Which statement about RNA is correct?

• it is single-stranded

• it is used to make proteins

• it contains uracil

• all of the above

A scientist has just finished collecting data on the feeding habits of a certain species of ant.

Which parts of a scientific process should the scientist undertake next?

• The scientist should make conclusions.

• The scientist should form a hypothesis.

• The scientist should communicate the results.

• The scientist should analyze the data.

Shortly after a chimpanzee embryo begins growing, its cells begin to look different.

Which statement best describes what is happening at this point in the chimpanzee embryo's development?

• Mitosis is making identical new cells from the original cells.

• Differentiation is taking place to create cells with specialized functions.

• Meiosis is making many different types of cells.

• Cellular respiration is breaking down old cells to form new ones.

Which statement is true about the cells in multicell organisms?

• They can all turn into the same kind of cell if needed.

• They are all identical.

• They are prokaryotic cells.

• They usually have certain special functions.

The cell membrane is made of phospholipids and is selectively permeable, or semipermeable.

Which major theme in biology does this statement represent?

• DNA transcribes into RNA, and RNA translates into proteins.

• All living things require an energy source.

• Structure relates to function.

• All organisms share seven basic characteristics.

One characteristic that living things share is metabolism.

Which statement best describes metabolism?

• Metabolism is the balance an organism maintains between building up and breaking down substances in its cells.

• Metabolism is all of the components an organism needs to survive.

• Metabolism is the different kinds of energy a cell uses to function.

• Metabolism is the sum of all of the internal systems in an organism.

The organic compounds in living things are organized into groups: carbohydrates, lipids, proteins, and nucleic acids.

Which two compounds do living things most commonly use as an energy source?

• carbohydrates and lipids

• lipids and nucleic acids

• proteins and nucleic acids

• proteins and carbohydrates

Which statement explains Mendel's law of segregation?

• Two alleles that were segregated come together during meiosis.

• Two alleles for a trait separate during meiosis.

• Alleles of the same trait segregate only during mitosis.

• Alleles of a trait can never be separated from each other.

Which statement about energy is true for all living things?

• Energy comes only from sunlight.

• Organisms require energy for survival.

• Energy cannot transfer from one organism to the next.

• Plants convert energy into ATP.

Which statement describes the manner in which an herbivore, such as a deer, gets and uses energy?

• It eats plants and converts the sugar in plants into ATP

  by cellular respiration.

• It uses photosynthesis to convert the glucose in plants into ATP.

• It changes plants into ATP through protein synthesis.

• It seeks out plants that contain chloroplasts to make ATP.