user: Q: Although much of the heart's basic structure is complete by the end of the fifth week, what fetal structures remain until birth or shortly after?   Read this paragraph and choose the correct option from the provided answers:  The five regions of the primitive heart tube develop into recognizable structures in a fully developed heart. The truncus arteriosus will eventually divide and give rise to the ascending aorta and pulmonary trunk. The bulbus cordis develops into the right ventricle. The primitive ventricle forms the left ventricle. The primitive atrium becomes the anterior portions of both the right and left atria, and the two auricles. The sinus venosus develops into the posterior portion of the right atrium, the SA node, and the coronary sinus. As the primitive heart tube elongates, it begins to fold within the pericardium, eventually forming an S shape, which places the chambers and major vessels into an alignment similar to the adult heart. This process occurs between days 23 and 28. The remainder of the heart development pattern includes development of septa and valves, and remodeling of the actual chambers. Partitioning of the atria and ventricles by the interatrial septum, interventricular septum, and atrioventricular septum is complete by the end of the fifth week, although the fetal blood shunts remain until birth or shortly after. The atrioventricular valves form between weeks five and eight, and the semilunar valves form between weeks five and nine.   Choices:  - heart shunts  - renal arteries  - umbilical arteries  - blood shunts   A:
blood shunts


Q: What kind of proteins either activate or deactivate the transcription of other genes?   Read this paragraph and choose the correct option from the provided answers:  What makes the heart form during development? What makes the skin form? What makes a structure become an arm instead of a leg? These processes occur during development because of a highly specific pattern of gene expression. This intensely regulated pattern of gene expression turns genes on in the right cell at the right time, such that the resulting proteins can perform their necessary functions to ensure proper development. Transcription factors play an extremely important role during development. Many of these proteins can be considered master regulatory proteins , in the sense that they either activate or deactivate the transcription of other genes and, in turn, these secondary gene products can regulate the expression of still other genes in a regulatory cascade. Homeobox genes and gap genes are important classes of transcription factors utilized during development.   Choices:  - carbon proteins  - perfect regulatory proteins  - master complex proteins  - master regulatory proteins   A:
master regulatory proteins


Q: Q: The process where an atomic nucleus breaks apart into two less massive nuclei is known as ______.   Read this paragraph and choose the correct option from the provided answers:  Fission is the process in which an atomic nucleus breaks apart into two less massive nuclei. Energy is released in the process in many forms, heat, gamma rays and the kinetic energy of neutrons. If these neutrons collide with nuclei and induce more fission, then a runaway chain reaction can take place. Fission is responsible for nuclear energy and atom-bomb explosions: the fission of uranium acts as a heat source for the Earth’s molten interior.   Choices:  - diffusion  - fusion  - collision  - fission   A:
A: fission


Question: Q: Where is glucose carried in the human body?   Read this paragraph and choose the correct option from the provided answers:  Chemical energy that organisms need comes from food. The nearly universal food for life is the sugar glucose. Glucose is a simple carbohydrate with the chemical formula C 6 H 12 O 6 . The glucose molecule stores chemical energy in a concentrated, stable form. In your body, glucose is the form of energy that is carried in your blood and taken up by each of your trillions of cells.   Choices:  - the liver  - the brain  - the heart  - the blood   A:
Answer: the blood


*Question*
Q: Heat expansion is a result of the increase of what type of energy, exhibited by molecules bumping together?   Read this paragraph and choose the correct option from the provided answers:  Heat expansion is a result of the increase of kinetic energy of the molecules. As their movement increases, they bump into each other more and the material slightly expands as a result. Most materials expand with heat. Water is a particularly interesting substance in that it contracts as its temperature increases from to (and then expands from to ).   Choices:  - light energy  - radioactivity  - harmonic energy  - kinetic energy   A:
**Answer**
kinetic energy


(Q).
Q: The variable is the speed of light. for the relationship to hold mathematically, if the speed of light is used in m/s, the wavelength must be in meters and the frequency in what?   Read this paragraph and choose the correct option from the provided answers:  The variable is the speed of light. For the relationship to hold mathematically, if the speed of light is used in m/s, the wavelength must be in meters and the frequency in Hertz.   Choices:  - gigawatts  - miles  - centimeters  - hertz   A:
(A).


assistant: hertz