Paired, fleshy extensions of the body wall in bristle worms that are used for locomotion and gas
exchange are called
a. metanephridia.
b. parapodia.
c. septa.
d. clitella.
e. setae.
B
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Which of these items associated with DNA packaging is the thickest?
a. a DNA double helix b. a solenoid c. a nucleosome d. an H2A histone protein e. an H1 histone protein
The genotypic F2 ratio expected in a dihybrid cross is 9:3:3:1
Indicate whether the statement is true or false
Where are blood cells produced in humans?
a. in the heart b. in the lymph nodes c. in the bone marrow d. in the kidneys
Which is NOT an example of an alien or exotic species?
a) introduction of Nile perch into Lake Victoria b) bison in the United States c) the mongoose brought to Hawaii to control rats d) zebra mussels introduced into the Great Lakes e) the brown tree snake in Guam