Which of these groups consist of parasitic flagellated cells, such as Trypanosoma, the organism that causes sleeping sickness?

A) metazoans
B) kinetoplastids
C) diatoms
D) brown algae
E) ciliates


Answer: B) kinetoplastids

Biology & Microbiology

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Connell studied two barnacle species, Balanus balanoides and Chthamalus stellatus. Where these species coexist,

____.

a. the realized niche of Balanus is smaller than its fundamental niche due to competition by Chthamalus b. the realized niche of Balanus is larger than its fundamental niche due to competition by Chthamalus c. the realized niche of Chthamalus is smaller than its fundamental niche due to competition by Balanus d. Balanus' fundamental niche includes all of Chthamalus fundamental niche e. the realized niche of Balanus is about equal to its fundamental niche

Biology & Microbiology

Which of the following statements is FALSE

about cowbirds? a. Their host relationship is similar to cuckoos. b. They are insect-eaters. c. Females can lay thirty eggs in a season. d. Cowbird hatchlings are recognized as imposters by host parents. e. They now parasitize at least fifteen species of native North American birds

Biology & Microbiology

Predators can switch to alternative prey when a prey

species is low in abundance as is shown in a. model I. b. model II. c. model III. d. models I and III. e. all of these models.

Biology & Microbiology

Which of the following heart tissues is not part of the internal conduction system of the heart?

A. atrioventricular bundle B. sinoatrial node C. semilunar valve D. Purkinje fibers E. atrioventricular node

Biology & Microbiology