Problema 5 · Biología URV Test Practice: Eukaryotes and Fungi

a. Which protozoan exhibits a remarkably reduced mitochondrial derivative (mitosome), a compact genome, and lacks a complete tricarboxylic acid (Krebs) cycle?

Solución: b) Giardia intestinalis

b. What environmental consequence is directly tied to blooms of toxic dinoflagellates?

Solución: b) Release of paralytic neurotoxins into marine food webs

c. What pigments determine the coloration of Chlorophyta?

Solución: a) Chlorophylls a and b

d. Where are diatoms primarily distributed?

Solución: b) Marine and freshwater aquatic habitats globally

e. What vector is responsible for the epidemiological transmission of Trypanosoma brucei?

Solución: b) Tsetse flies (Glossina)

f. What metabolic task is executed by protistan food vacuoles?

Solución: b) Enzymatic breakdown of phagocytosed particles

g. Which phrase describes the sexual and life history characteristics of green algae?

Solución: c) Complex life cycles alternating between asexual and sexual phases

h. Which group of eukaryotic algae develops into massive macroscopic seaweed bodies (kelps)?

Solución: b) Phaeophyceae (brown algae)

i. What organelle provides locomotion across the phylum Ciliophora?

Solución: b) Cilia

j. What serves as the primary energetic input for phototrophic protists?

Solución: b) Sunlight