Bacteria that have flagella distributed all over the cell surface are described as (having)
A) monotrichous.
B) periplasmic flagella.
C) lophotrichous.
D) amphitrichous.
E) peritrichous.
Answer: E
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The first level of gene regulation occurs along the chromosome, through chemical modifications of the DNA or histones
A. true B. false
What are the possible phenotypes of the children if the mother's genotype is IAi for blood type and the father is IBi?
(Use the Punnett square to verify your answer.) a. all AB b. A, B c. A, AB d. A, B, O e. A, B, AB, O
A cell that neither gains nor loses water when it is immersed in a solution is what?
A. hypertonic to its environment. B. metabolically inactive. C. hypotonic to its environment. D. isotonic to its environment.
From which of the following fish are the amphibians thought to have evolved?
a) Class Myxini b) Class Actinopterygii c) Class Sarcopterygii d) Class Chondrichthyes e) Class Cephalaspidomorphi