Q: Answer the following question given this paragraph: Arthropod at http://animal. discovery. com/animal-facts/arthropod-info. htm. Q: A bicycle is an example of a compound machine made of many what? Choices: - linked machines - useful machines - interchangeable machines - simple machines A:
A: simple machines

Q: Answer the following question given this paragraph: The retina is a membrane lining the back of the eye. The retina has nerve cells called rods and cones that change images to electrical signals. Rods are good at sensing dim light but can't distinguish different colors of light. Cones can sense colors but not dim light. There are three different types of cones. Each type senses one of the three primary colors of light (red, green, or blue). Q: What do you call the membrane lining the back of the eye? Choices: - cornea - stimulation - aperture - retina A:
A: retina

Q: Answer the following question given this paragraph: Flatworms do not have a respiratory system. Instead, they have pores that allow oxygen to enter through their body. Oxygen enters the pores by diffusion. Q: By what process does oxygen enter the pores of flatworms? Choices: - absorption - filtration - permeation - diffusion A:
A: diffusion

Q: Answer the following question given this paragraph: Figure 15.12 Trypanosoma brucei is the causative agent of sleeping sickness in humans. The mRNAs of this pathogen must be modified by the addition of nucleotides before protein synthesis can occur. (credit: modification of work by Torsten Ochsenreiter). Q: What is the causative agent of sleeping sickness in humans? Choices: - pseudomonas asplenii - escherichia coli - bacillus aerophilus - trypanosoma brucei A:
A: trypanosoma brucei