The precursor of each new nucleotide in a strand of DNA is a
A) deoxynucleoside 5'-diphosphate.
B) deoxynucleoside 3'-diphosphate.
C) deoxynucleoside 5'-triphosphate.
D) deoxynucleoside 3'-triphosphate.
Answer: C
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Molecular studies suggest microsporidia appear to be most closely related to members of which fungal
phylum?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
In the accompanying figure, the part of the embryo that contains most of the food used by the embryonic plant during germination is labeled with the number:
a. 2
b. 3
c. 4
d. 5
e. 6
Fragments of DNA have been extracted from the remnants of extinct woolly mammoths, amplified, and sequenced. These can now be used to _____
A) introduce certain mammoth traits into relatives, such as elephants B) clone live woolly mammoths C) appreciate the reasons why mammoths went extinct D) better understand the evolutionary relationships among members of related taxa
Which of the following have four-chambered hearts?
A) Fishes B) Spiders C) Birds D) Frogs