You are given the task of designing an aerobic, mixotrophic protist that can perform photosynthesis in fairly deep water (for example, 250 meters deep) and can also crawl about and engulf small particles
With which two of the following structures would you provide your protist?
1. hydrogenosome
2. apicoplast
3. pseudopods
4. chloroplast from red alga
5. chloroplast from green alga
A) 1 and 2
B) 2 and 3
C) 3 and 4
D) 4 and 5
C
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Type S Streptococcus pneumoniae bacterium is lethal and will kill its host. If heat inactivated the S strain dies and becomes nonlethal. Type R Streptococcus pneumoniae is a nonvirulent strain of bacteria. What would occur if one were to inject both the R strain and heat-killed S strains into a host organism such as the mouse?
A. The S strain would be transformed into the nonvirulent R strain and kill the host. B. The R strain would be transformed into the virulent S strain and kill the host. C. The S strain would be transformed into the nonvirulent R strain and not affect the host. D. The R strain would be transformed into the virulent S strain and not affect the host. E. Neither the S nor the R strain would change.
The start signal in an mRNA strand is:
1.UAG 2.GUA 3.AUG 4.TAG 5.ATG
Which of the following is false regarding bronchitis?
a. It can result from chronic irritation of the ciliated lining of the bronchioles. b. Irritated epithelial cells decrease their production of mucus. c. Bacteria colonize the epithelial mucus. d. Early attacks are treatable. e. Fibrous scar tissue forms in chronic bronchitis.
The intertidal zone is defined by
A) being a marine environment. B) containing starfish. C) being continually exposed and submerged by the ocean. D) rocky shores.