University:
Acadia University
Course:
BIOL 2663 | Marine Biology
Academic year:

2024
Views:

284

Pages:

4
Author:

Nabila n.

Quiz on r-selected species 1. Which characteristic is NOT typical of r-selected species? A. Extensive parental care B. High reproductive rate C. Rapid maturation D. Short lifespan Answer: Extensive parental care (A) R-selected species are characterized by high reproductive rates, short lifespans, and little to no parental care. 2. What is a common environmental condition that supports the success of r-selected species? A. Frequent disturbances B. High resource competition C. Stable climates D. Low predation rates Answer: Frequent disturbances (A) R-selected species thrive in unstable environments characterized by frequent disturbances such as ﬂoods or droughts. 3. Which of the following is an example of an r-selected species? A. Whales B. Flies C. Humans D. Elephants 2 Answer: Flies (B) Flies are an example of r-selected species, which are characterized by high reproductive rates. 4. What trade-off do r-selected species often face? A. Low reproduction rates resulting in rapid population growth B. Large body sizes improving resource utilization C. High reproductive rates at the expense of offspring survival D. High parental investment leading to longer lifespans Answer: High reproductive rates at the expense of offspring survival (C) R-selected species often produce many offspring quickly, which can negatively affect individual offspring survival. 5. Which of the following is NOT a trait associated with r-selected species? A. Long generation time B. Large number of offspring C. Small body size D. Little or no parental care Answer: Long generation time (A) R-selected species are characterized by short generation times, which allow for rapid adaptation and reproduction. 6. How do r-selected species typically respond to high predation rates? A. By migrating to new habitats 3 B. By increasing offspring care C. By reducing reproductive rates D. By producing more offspring Answer: By producing more offspring (D) To compensate for high predation rates, r-selected species increase their reproductive rates to ensure population survival. 7. Which of the following statements best differentiates r-selected from K-selected species? A. K-selected species prioritize offspring survival, while r-selected species focus on quantity. B. K-selected species reproduce rapidly in unstable environments. C. R-selected species have longer lifespans than K-selected species. D. R-selected species are typically larger than K-selected species. Answer: K-selected species prioritize offspring survival, while r-selected species focus on quantity. (A) K-selected species invest in fewer offspring with greater care, while r-selected species focus on producing many offspring quickly. 8. What role do r-selected species play in ecosystems? A. They are critical in deep-sea ecosystems. B. They primarily function as apex predators. C. They are responsible for stabilizing ecological communities. D. They contribute to biodiversity and act as primary consumers. Answer: They contribute to biodiversity and act as primary consumers. (D) 4 R-selected species play a vital role in ecosystems by contributing to biodiversity and fulﬁlling the role of primary consumers.