Answer the following question given this paragraph: Note: Atomic mass is given to three decimal places, if known. Now that we understand that atoms have mass, it is easy to extend the concept to the mass of molecules. The molecular mass is the sum of the masses of the atoms in a molecule. This may seem like a trivial extension of the concept, but it is important to count the number of each type of atom in the molecular formula. Also, although each atom in a molecule is a particular isotope, we use the weighted average, or atomic mass, for each atom in the molecule. For example, if we were to determine the molecular mass of dinitrogen trioxide, N2O3, we would need to add the atomic mass of nitrogen two times with the atomic mass of oxygen three times:. Q: What is the sum of the masses of the atoms in a molecule? Choices: - compound mass - mass effect - atomic energy - molecular mass A:
molecular mass
Answer the following question given this paragraph: When lactose is absent, a repressor protein binds to the operator. The operator is located between the promoter and the three lac operon genes. The protein blocks the binding of RNA polymerase to the promoter. As a result, the lac genes are not expressed. Q: When lactose is absent, a repressor protein binds to what? Choices: - differential - network - worker - operator A:
operator
Q: Answer the following question given this paragraph: Amphibians reproduce sexually. Fertilization may take place inside or outside the body. Amphibians are oviparous. Embryos develop in eggs outside the mother's body. Q: How do amphibians reproduce? Choices: - asexually - biologically - they don't - sexually A:
A: sexually
Question: Answer the following question given this paragraph: Amphibians may attract mates with calls or scents. Q: Amphibians may attract mates with what? Choices: - only calls - only scents - neither - calls or scents A:
Answer: calls or scents
*Question*
Answer the following question given this paragraph: As you would expect, where plates collide there are lots of intense earthquakes and volcanic eruptions. The subducting oceanic plate melts as it reenters the mantle. The magma rises and erupts. This creates a volcanic mountain range near the coast of the continent. This range is called a continental arc . The Andes Mountains, along the western edge of South America, are a volcanic arc ( Figure below ). Q: The subducting oceanic plate does what as it reenters the mantle? Choices: - evaporates - disappers - freezes - melts A:
**Answer**
melts
Answer the following question given this paragraph: Autotrophs make their own food. Heterotrophs get food by eating other living things. Q: How do autotrophs get food? Choices: - From Water - Soak up from host cell - From Plant matter - make their own A:
make their own