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Population termed r-strategists...

Population termed r-strategists

A

Have J-shaped growth curves

B

Have type III survivorship curves

C

Are usually pioneer species

D

All of these

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The correct Answer is:
### Step-by-Step Solution: 1. **Definition of R-Strategists**: - R-strategists are organisms that reproduce quickly and in large numbers. They typically have a high reproductive rate and are often small in size. 2. **Characteristics of R-Strategists**: - R-strategists tend to have short life spans. - They produce many offspring at once, but provide little to no parental care. - They thrive in unstable or unpredictable environments where the ability to reproduce quickly can be advantageous. 3. **Growth Curve**: - The growth curve of R-strategists is typically represented as a J-shaped curve, which indicates exponential growth. - In this curve, the population size increases rapidly when resources are abundant and there is little competition. 4. **Type III Survival Curve**: - R-strategists usually exhibit a Type III survival curve, which means that a large number of offspring are produced, but many do not survive to adulthood. - This curve reflects high mortality rates in early life stages, with few individuals surviving to reproduce. 5. **Examples of R-Strategists**: - Common examples of R-strategists include bacteria, insects, and certain plants that can quickly colonize an area after a disturbance. 6. **Pioneer Species**: - R-strategists are often pioneer species in ecological succession, as they are the first to colonize barren or disturbed environments, paving the way for more stable communities. ### Final Answer: R-strategists are populations characterized by small-sized organisms that reproduce rapidly and in large numbers, typically exhibiting a J-shaped growth curve and a Type III survival curve. Examples include bacteria and certain insects. ---

### Step-by-Step Solution: 1. **Definition of R-Strategists**: - R-strategists are organisms that reproduce quickly and in large numbers. They typically have a high reproductive rate and are often small in size. 2. **Characteristics of R-Strategists**: - R-strategists tend to have short life spans. - They produce many offspring at once, but provide little to no parental care. ...
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