Answer the following question given this paragraph: Ecologists look at many factors that help to describe a population. First, ecologists can measure the number of individuals that make up the population, known as population size . They can then determine the population density , which is the number of individuals of the same species in an area. Population density can be expressed as number per area , such as 20 mice/acre, or 50 rabbits/square mile. Q: How is population density expressed? Choices: - per arable land - number per household - arable land per capita - number per area A:
number per area
Answer the following question given this paragraph: An ammeter measures the current traveling through the circuit. They are designed to be connected to the circuit in series, and have an extremely low resistance. If an ammeter were connected in parallel, all of the current would go through the ammeter and very little through any other resistor. As such, it is necessary for the ammeter to be connected in series with the resistors. This allows the ammeter to accurately measure the current flow without causing any disruptions. In the circuit sketched above, the ammeter is . Q: An ammeter must be connected in series with what to allow it to accurately measure the current flow without causing any disruptions? Choices: - insulators - configurations - capacitors - resistors A:
resistors
Q: Answer the following question given this paragraph: Carbon dioxide is the main greenhouse gas causing global warming. There are several possible ways to reduce carbon dioxide emissions. They include cap-and-trade systems, carbon taxes, and carbon sequestration. Q: What is the main greenhouse gas causing global warming? Choices: - nitrogen - sulfur - carbon monoxide - carbon dioxide A:
A: carbon dioxide
Question: Answer the following question given this paragraph: Q: What occurs before the endometrium thickens in estrous cycles? Choices: - fertilization - pregnancy - copulation - ovulation A:
Answer: ovulation
*Question*
Answer the following question given this paragraph: The burner on a gas stove burns with a pretty blue flame like the one pictured in the opening image. The fuel burned by most gas stoves is natural gas, which consists mainly of methane. Methane is a compound that contains only carbon and hydrogen. Like many other compounds that consist of just these two elements, methane is used for fuel because it burns very easily. Methane is an example of a covalent compound. Q: Natural gas, such as those burned by gas stoves, is composed mostly of this? Choices: - sulfur - carbon monoxide - oxygen - methane A:
**Answer**
methane
(Q).
Answer the following question given this paragraph: Bacteria reproduce through a process called binary fission . During binary fission, the chromosome copies itself, forming two genetically identical copies. Then, the cell enlarges and divides into two new daughter cells. The two daughter cells are identical to the parent cell. Binary fission can happen very rapidly. Some species of bacteria can double their population in less than ten minutes! This process makes it possible for a tremendous bacterial colony to start from a single cell. Q: Bacteria reproduce through what process? Choices: - binary fusion - tertiary fission - residual fission - binary fission A:
(A).
binary fission