Which of the following statements is NOT true about the flatworms?
a) Liver flukes and blood flukes are parasites in humans only.
b) Schistosomiasis is a common human blood disease caused by flukes in tropical areas.
c) Tapeworms are hermaphroditic, having both male and female reproductive structures in each proglottid.
d) Planaria contain pigmented, photosensitive eyespots.
e) tapeworms have a ladder-type nervous system similar to other flatworms.
Ans: a) Liver flukes and blood flukes are parasites in humans only.
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The key characteristic of third-generation sequencing is the ability to sequence single molecules of DNA
Indicate whether the statement is true or false.
The taxonomy of the methanogens is based on
A) phenotypic analysis. B) phylogenetic (comparative nucleic acid sequencing) analysis. C) phenotypic and phylogenetic analyses. D) neither phenotypic nor phylogenetic analysis.
Birds are least likely to be attracted to flowers with
a. yellow petals. b. red petals. c. both red and yellow parts. d. strong attractive scents. e. intense red and yellow patterns on petals.
You read that the frequency of a particular disease-associated recessive allele in a population is 12%. What does that mean?
A) 12% of the population has the disease caused by that allele. B) 12% of the population is a carrier for that disease. C) For every 100 people, there are 12 copies of the allele. D) The allele is present in 12% of the cells in your body.