A Lek is:
a. a permanent territory in songbirds.
b. a mating location.
c. a temporary arena in which males present themselves.
d. a group of sneaker males.
e. A and B.
C
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Nitrogen is released into the atmosphere by ____
a. nitrogen fixation b. denitrification c. nitrification d. ammonification e. decomposition
Conserved indels are ________.
A. sequences in eukaryotic mRNAs that are removed by RNA splicing B. a type of signature sequence particularly useful for phylogenetic analysis C. sequences of protein coding genes that are found altered in related species due to their tendency to accumulate small deletions D. a type of transposable sequence characteristic of a particular genus, and useful for taxonomic analysis
Many researchers hypothesize that modern humans have derived from the Homo ergaster populations that spread around the world starting about 2 million years ago. This hypothesis is known as the:
A. out-of-Africa hypothesis B. into-Africa hypothesis C. multiregional hypothesis D. uniregional hypothesis E. None of the answer options is correct.
Which of the following is not evidence supporting the Lyon hypothesis of X inactivation?
A. Female mammals that are heterozygous for X-linked traits are phenotypically mosaics. B. A highly condensed structure is consistently observed in female cells, but not in male cells. C. A female cat that is homozygous for coat color cannot produce calico offspring. D. Calico patterns of coat color are never exactly the same. E. A genetically normal male cat can never be calico.