Q: Sex-linked traits are located on genes on what chromosomes? Read this paragraph and choose the correct option from the provided answers: Sex-linked traits are located on genes on the sex chromosomes. Choices: - reactive - neural - dna - sex A:
sex

Q: What is the only metal that is liquid at room temperature? Read this paragraph and choose the correct option from the provided answers: A familiar liquid is mercury metal. Mercury is an anomaly. It is the only metal we know of that is liquid at room temperature. Mercury also has an ability to stick to itself (surface tension) a property all liquids exhibit. Mercury has a relatively high surface tension, which makes it very unique. Here you see mercury in its common liquid form. Choices: - hydrogen - gas - water - mercury A:
mercury

Q: Q: Different isotopes of an element have different mass numbers because they have different numbers of what? Read this paragraph and choose the correct option from the provided answers: An atom's mass number is its mass in atomic mass units (amu), which is about equal to the total number of protons and neutrons in the atom. Different isotopes of an element have different mass numbers because they have different numbers of neutrons. Choices: - protons - electrons - nuclei - neutrons A:
A: neutrons

Question: Q: In most animals, the circulatory system is used to transport blood through the what? Read this paragraph and choose the correct option from the provided answers: CHAPTER SUMMARY 40.1 Overview of the Circulatory System In most animals, the circulatory system is used to transport blood through the body. Some primitive animals use diffusion for the exchange of water, nutrients, and gases. However, complex organisms use the circulatory system to carry gases, nutrients, and waste through the body. Circulatory systems may be open (mixed with the interstitial fluid) or closed (separated from the interstitial fluid). Closed circulatory systems are a characteristic of vertebrates; however, there are significant differences in the structure of the heart and the circulation of blood between the different vertebrate groups due to adaptions during evolution and associated differences in anatomy. Fish have a two-chambered heart with unidirectional circulation. Amphibians have a three-chambered heart, which has some mixing of the blood, and they have double circulation. Most non-avian reptiles have a three-chambered heart, but have little mixing of the blood; they have double circulation. Mammals and birds have a four-chambered heart with no mixing of the blood and double circulation. Choices: - fur - stratum corneum - nerves - body A:
Answer: body

*Question*
Q: Cells must also be able to separate their relatively stable interior from what? Read this paragraph and choose the correct option from the provided answers: Cells share the same needs: the need to get energy from their environment, the need to respond to their environment, and the need to reproduce. Cells must also be able to separate their relatively stable interior from the ever-changing external environment. They do this by coordinating many processes that are carried out within organelles, or other cellular structures. Structures that are common to many different cells indicate the common history shared by cell-based life. Examples of these common structures include the components of both the cell (or plasma) membrane and the cytoskeleton, and other structures shown in Figure above . Choices: - their habitat - predators - competition and chaos - the external environment A:
**Answer**
the external environment

(Question)
Q: The fight or flight response involves what system? Read this paragraph and choose the correct option from the provided answers: Figure 15.1 Fight or Flight? Though the threats that modern humans face are not large predators, the autonomic nervous system is adapted to this type of stimulus. The modern world presents stimuli that trigger the same response. (credit: Vernon Swanepoel). Choices: - functional nervous system - cellular nervous system - voluntary nervous system - autonomic nervous system A:
(Answer)
autonomic nervous system