You have discovered a new microorganism, but you want to know if it is a eukaryote or a prokaryote. To investigate this question you prepare a slide with a simple stain and view it with a light microscope with a 40X objective lens and 10X ocular lens
You also prepare a control slide using Saccharomyces cerevisiae (a unicellular eukaryote). You can see the cells on your control slide, but you don't see cells when you look at your unknown microorganism. What can you conclude from this experiment?
A) The experiment failed to visualize the organism because the stain killed it.
B) Your new unknown microorganism is probably a virus.
C) The cells of the new unknown microorganism may be too small to see with the objective and ocular lenses you used.
D) The new unknown microorganism is probably an archaeon.
Answer: C
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A) chemical characteristics. B) physical characteristics. C) water content. D) chemical characteristics, physical characteristics, and water content.
Answer the question using the accompanying figure. In the internal leaf structure, the structure labeled "2" is ____
a. a vascular bundle b. spongy mesophyll c. epidermis d. a stoma e. palisade mesophyll
The cylinders in this experiment represent a 24-hour period. The light area represents light periods during a 24-hr. period and the dark area represents dark periods during a 24-hr. period. The critical length of dark vs. light periods for flowering is depicted by the dotted line. Note that some plants are flowering and some are not flowering. Study the results of this experiment on photoperiodism and flowering to determine whether the following statements are true or false.Short-day plants flower when the day length is shorter than the critical length, but the required dark period is interrupted by a flash of light.
Answer the following statement true (T) or false (F)
To confirm a presumptive identification of an isolate of streptococci, serological testing is performed.
A) True B) False