The causative agents of bubonic plague, which killed 100 million people during the 14th century, were
A) viruses. B) fish. C) fleas. D) rats. E) bacteria.
E
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The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, while "1" indicates the derived condition. Which trait is least informative of phylogenetic relationships within the group?
A. A
B. B
C. C
D. D
E. E
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
· What key words does the question contain and what do they mean?
Gather Content
· What do you already know about cladistics?
Consider Possibilities
· What other information is related to the question? Which information is most useful?
Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
Reflect on Process
· Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The chemical composition of the gases surrounding the Earth has changed substantially over the past 4 billion years. One notable change was due to the emergence of photosynthetic organisms. The process of photosynthesis increased the amount of what gas in the atmosphere?
A. Carbon dioxide (CO2). B. Nitrogen (N2). C. Hydrogen sulfide (H2SO4). D. Oxygen (O2). E. Water vapor (H2O).
__________ is a concentration of nerves and sensory structures at the head end. Fill in the blank(s) with the appropriate word(s)
The body of a fungus has several characteristics. One of these is their hyphae, long chains of cells. Which of the following statements best describes the nature of septa and cross walls?
A. Septa form cross walls between the long chains of cells that make up hyphae. B. Septa of the cross walls are formed on the outside of fungal cells and give the fungal body more rigidity. C. Spores of fungi that are formed within reproductive structures have cross walls separated by septa. D. The cross wall within the nuclear membrane of every fungal body forms septa. E. Cross walls are responsible for the formation of spindle plaques within the hyphae after the septa are produced.