Which of the following is the most diverse and numerous vertebrate class?

a) Class Actinopterygii
b) Class Reptilia
c) Class Chondrichthyes
d) Class Sarcopterygii
e) Class Myxini


Answer: a) Class Actinopterygii

Biology & Microbiology

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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, and a "1" indicates the derived condition. Which species would you designate as the outgroup?  



A.  1
B.  2
C.  3
D.  4
E.  5
F.  6

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?
 
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?

Biology & Microbiology

The minimum number of mutations that is required before cancer is likely to develop is

_____.

a. one b. two c. three d. four

Biology & Microbiology

Denitrifying bacteria:a

make nitrogen available for assimilation. b. decompose organic nitrogen compounds into nitrate. c. decompose organic nitrogen compounds into ammonia. d. fix nitrogen into ammonia. e. convert nitrate into atmospheric nitrogen.

Biology & Microbiology

A plant embryo enclosed in a protective covering is a(n) 

A. pollen. B. egg. C. seed. D. spore.

Biology & Microbiology