The earliest type of eukaryotic organism currently known is a type of ____.
A. virus
B. bacterium
C. Alga
D. animal-like protist
E. fungus
Answer: C
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If DNA replication took place from one end of the largest human chromosome to the other, it would take approximately:
A. 2 seconds. B. 2 minutes. C. 2 hours. D. 2 days. E. 2 months.
Tetrapods colonized land at about the same time as the early _____ radiations around _____ million years ago
A. plant; 575 B. hemichordate; 542 C. arthropod; 420 D. insect; 360 E. plant; 100
Achondroplasia, a hereditary form of dwarfism, is an autosomal dominant disorder; however homozygous dominant
individuals either die before birth or very shortly thereafter. The homozygous recessive condition is normal. A dwarf couple decide to have children. Use this information to answer the following question:Of the children of this couple who survive, what is the probability that they will be normal?
a. 0 b. ¼ c. 1/3 d. 2/3 e. ½
Which element is LEAST likely to be an abiotic factor that can affect community structure?
A. Sunlight B. Rainfall C. Cloud cover D. Decomposing organic matter E. Temperature