Question

population sampling methods

1. transect lines - counting along ____________ meter lines
2. mark and recapture - ____________ animals, releasing them, then recapturing to estimate total

humans and population control
density - dependent factors

• ____________ can spread quickly in crowded populations
• examples: aids epidemic, ____________

future concerns

• limited ____________ supply
• limited ____________ supply
• humans are ____________ exempt from population control factors

Explanation:

1. In transect - line sampling in biology, counting is done along fixed - length meter lines.
2. Mark - and - recapture involves marking animals first.
3. In density - dependent factors in population biology, diseases spread quickly in crowded populations, and examples include AIDS and influenza.
4. Future concerns for populations often include limited food and water supplies. Also, humans have some unique aspects as they can be somewhat exempt from typical population - control factors due to their technological and cultural adaptations.

Answer:

1. fixed - length
2. Marking

Density - Dependent Factors:

• Diseases
• Influenza (or other applicable diseases)

Future Concerns:

• Food
• Water
• somewhat