Question: Q: How many pathways do plants have for carbon fixation? Read this paragraph and choose the correct option from the provided answers: 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. ". Choices: - one - four - two - three A:
Answer: three

Question: Q: A biofilm is a colony of what that is stuck to a surface such as a rock or a host's tissues? Read this paragraph and choose the correct option from the provided answers: Many prokaryotes have an extra layer, called a capsule, outside the cell wall. The capsule protects the cell from chemicals and drying out. It also allows the cell to stick to surfaces and to other cells. Because of this, many prokaryotes can form biofilms, like the one shown in Figure below . A biofilm is a colony of prokaryotes that is stuck to a surface such as a rock or a host's tissues. The sticky plaque that collects on your teeth between brushings is a biofilm. It consists of millions of bacteria. Choices: - insects - eukaryotes - vacuoles - prokaryotes A:
Answer: prokaryotes

Question: Q: Yogurt is made from milk fermented with what type of organism? Read this paragraph and choose the correct option from the provided answers: Mom the Barbarian. Yogurt is made from milk fermented with bacteria . CC BY 2.0. Choices: - viruses - yeast - algae - bacteria A:
Answer:
bacteria