The jawless fish that is parasitic, attaching itself to and sucking fluids from the tissues of a living fish, is the
a) hagfish.
b) ray-finned fish.
c) coelacanth.
d) lamprey.
e) skate.
Ans: d) lamprey.
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Deoxyribonucleotidesare included in the Sanger sequencing reaction mix to _____
a. provide a substrate forRNA polymerase b. enhance the activity of the dideoxyribonucleotides c. allow longer DNA fragments (up to 300 additional base pairs)to be sequenced d. allow the production of multiple DNA fragments of different lengths e. prevent the DNA polymerase from making too many errors
Precancerous cervical cells can be detected by ____
a. routine Pap smears b. self-examination c. a series of blood tests d. x-ray examinations e. ultra-sound
Which of the following most closely resemble the earliest ancestor of all animals?
a. colonial, flagellated protists b. unicellular protozoa c. colonial algae d. gram-negative bacteria
If an Arabidopsis plant does not express homeotic genes during flower development
A. the plant will only develop to the heart stage. B. the plant will not develop cotyledons. C. the plant will develop leaves instead of flowers. D. the plant will develop flowers instead of leaves. E. the plant will die.