Which of the following is an advantage of the direct microscopic count?
A) can readily count organisms that are motile
B) can easily distinguish live from dead cells
C) requires no incubation time
D) sample volume is unknown
E) requires a large number of cells
C
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Who are the parents of Baby Joe and Baby Jane?
Two babies are mixed up in the hospital nursery. The blood types of Couple 1 are A and O and the blood types of Couple 2 are AB and B. Baby Joe has blood type O and Baby Jane has blood type A. A. Couple 1, Baby Joe; Couple 2, Baby Jane B. Couple 1, Baby Jane; Couple 2, Baby Joe C. Couple 1, Baby Joe or Baby Jane; Couple 2, Baby Jane D. Couple 1, Baby Joe or Baby Jane; Couple 2 could not be parents of either baby E. Couple 1, Baby Joe; Couple 2, Baby Joe or Baby Jane
Allele-specific oligonucleotides (ASO) for the normal and disease alleles of a gene are in one section of a microarray. The disease is a recessive trait. If a probe made from an individual's genomic DNA hybridizes with both ASOs, what can be inferred about the individual?
A) The individual has two normal alleles. B) The individual has the disease. C) 50% of the individual's children are expected to be carriers. D) One of the individual's parents has the disease.
The dermal tissue system consists of
A) phloem. B) epidermis. C) xylem. D) parenchyma tissue. E) collenchyma tissue.
The purpose of including an outgroup in the construction of a phylogeny is to __________.
a. indicate whether two characters are homologous b. determine dates of divergence between lineages c. determine which characters are ancestral d. increase parsimony e. All of the listed responses are correct.