You discover a new species of protist. Which of the following characteristics would provide the strongest evidence for your hypothesis that your species belongs in Euglenida?
A) It is photosynthetic.
B) It contains the carbohydrate paramylon.
C) It reproduces asexually.
D) It is unicellular.
E) It lacks a cell wall.
Answer: B
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A. hypothesis B. theory C. systems biology D. reductionism E. prediction
Which of the following enzymes join the
paired sticky ends of DNA fragments? a. reverse transcriptases b. restriction enzymes c. DNA ligases d. DNA polymerases e. polynucleotide kinases
Parasitic worms, even meters-long tapeworms, are studied in microbiology because
A) they are parasites. B) diagnosis usually involves microscopic examination of patient samples. C) the Gram stain can be used to identify them. D) Leeuwenhoek first discovered them. E) no one else wants to study them.
As conservation biologists try to slow the rate of human-caused extinctions, they often have to make hard choices about which habitats and species to save with their limited resources
Your textbook presented the case of the cichlid fishes of Lake Victoria in Africa. Make an argument in favor of either the idea that the recent loss of 200 of the 400 species of recently evolved fish (during the last 14,000 years) due to the introduction of the Nile perch as a food fish is either a minor phylogenetic loss or a tragic loss of an evolutionary hotspot. What will be an ideal response?