Eyelash length is an inherited trait. In the human population, there is an eyelash length gene. There are two possible variants of this gene - an allele for long eyelashes (> 1cm) and an allele for short eyelashes (1 cm or less). The allele for long eyelashes is dominant (L) and the allele for short eyelashes is recessive (l). An individual who is heterozygous for eyelash length would have which
of the following genotypes?
A. ll
B. Ll
C. LL
D. Short eyelashes
E. Long eyelashes
B. Ll
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The island fox, Urocyon littoralis, is only found on the Channel Island off the coast of California. This species is not found on the mainland where the gray fox, Urocyon cinereoargenteus, lives. This species would be considered to be
A. extinct. B. a transitional form. C. endemic. D. exotic. E. an ancestral form.
When pressure in the lungs falls below atmospheric pressure, ____
a. oxygen leaves the blood b. oxygen enters the blood c. air exits the lungs d. air flows into the lungs e. lung volume decreases
Do the results for Suspects 1 and 2 appear to be similar?
a. yes b. no
Which type of metabolism is unique to prokaryotes?
a. chemoheterotroph b. photoheterotroph c. photolithotroph d. photoautotroph