Answer the following question given this paragraph: Plants have evolved three pathways for carbon fixation. The most common pathway combines one molecule of CO 2 with a 5-carbon sugar called ribulose biphosphate (RuBP). The enzyme which catalyzes this reaction, ribulose-1,5-bisphosphate carboxylase oxygenase (nicknamed RuBisCo ), is the most abundant enzyme on earth! The resulting 6-carbon molecule is unstable, so it immediately splits into two much more stable 3-carbon phosphoglycerate molecules. The 3 carbons in the first stable molecule of this pathway give this largest group of plants the name "C-3. ". Q: How many pathways do plants have for carbon fixation? Choices: - one - four - two - three A:
three
Answer the following question given this paragraph: Light may be refracted by matter. The light is bent when it passes from one type of matter to another. Refraction of light is similar to refraction of sound waves. You can also read more about refraction of light in the lesson "Optics. ". Q: What occurs when light bends as it passes from one type of matter to another? Choices: - vibration - reflection - resonance - refraction A:
refraction
Q: Answer the following question given this paragraph: The metal part of the compound is named as the element. Q: What is the metal part of the compound named as? Choices: - the base - the source - the basic - the element A:
A: the element
Question: Answer the following question given this paragraph: In other covalent bonds, electrons are shared equally. These bonds are called nonpolar covalent bonds. Neither atom attracts the shared electrons more strongly. As a result, the atoms remain neutral in charge. The oxygen (O 2 ) molecule in the Figure below has two nonpolar bonds. The two oxygen nuclei have an equal force of attraction for their four shared electrons. Q: How are electrons shared in covalent bonds? Choices: - randomly - orderly - unequally - equally A:
Answer: equally
*Question*
Answer the following question given this paragraph: There are many blood vessels in the kidneys ( Figure above ). The kidneys remove urea and other wastes from the blood through tiny filtering units called nephrons. Nephrons ( Figure below ) are tiny, tube-shaped structures found inside each kidney. Each kidney has up to a million nephrons. Each nephron collects a small amount of fluid and waste from a small group of capillaries. Q: What are the tiny, tube-shaped structures found inside a kidney called? Choices: - neurons - jejunum - dendrites - nephrons A:
**Answer**
nephrons
(Question)
Answer the following question given this paragraph: supersaturated : When the amount of solute dissolved exceeds the solubility. Occurs when a solution is saturated and the temperature slowly drops. Q: What state occurs when the amount of solute dissolved exceeds the solubility? Choices: - polymerisation - density - alkalinity - supersaturation A:
(Answer)
supersaturation