Which of the following is the correct order of complexity, going from least to most complex?
A) molecule, atom, organ, tissue, cell, organelle
B) atom, molecule, organelle, cell, organ, tissue
C) atom, molecule, organelle, cell, tissue, organ
D) organ, tissue, cell, organelle, molecule, atom
E) organ, tissue, cell, organelle, atom, molecule
Answer: C
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How do endotherms and ectotherms derive most of their body heat?
A. Both ectotherms and endotherms derive most of their body heat through their environment. B. Ectotherms derive most of their body heat through their environment, while endotherms derive most of their body heat through metabolic processes. C. Both ectotherms and endotherms derive most of their body heat through metabolic processes. D. Ectotherms derive most of their body heat through metabolic processes, while endotherms derive most of their body heat through their environment E. Ectotherms derive most of their body heat through their fur, while endotherms derive most of their body heat through insulating scales.
The most successful mammals belong to the marsupials group.
Answer the following statement true (T) or false (F)
A young relative of yours has never had much energy. He goes to a doctor for help and is sent to the hospital for some tests. There they discover his mitochondria can use only fatty acids and amino acids for respiration, and his cells produce more lactate than normal. Of the following, which is the best explanation of his condition?
A) His mitochondria lack the transport protein that moves pyruvate across the outer mitochondrial membrane. B) His cells cannot move NADH from glycolysis into the mitochondria. C) His cells contain something that inhibits oxygen use in his mitochondria. D) His cells lack the enzyme in glycolysis that forms pyruvate. E) His cells have a defective electron transport chain, so glucose goes to lactate instead of to acetyl CoA.
One of the factors that helps animal-pollinated flowering plants transfer pollen to plants of the same species is that
A) pollinators are able to rapidly extract nectar from any species of flower, regardless of the pollinators' past or recent experience with a given flower type. B) most pollinators broadly use many different types of flowers. C) many pollinators have limited learning capacities and are most successful at obtaining food if they continue to visit the same type of flower after learning how to extract its nectar. D) pollinators only visit flowers that produce massive amounts of pollen.