ASVAB ASVAB General Science Biology and Ecology 4 — Questions and Answers
Question 1: Which type of symbiosis benefits one organism while the other is neither helped nor harmed?
- Mutualism
- Parasitism
- Commensalism (Correct answer)
- Competition
Correct answer: Commensalism
Commensalism is the relationship where one organism benefits and the other is unaffected.
Question 2: What is the primary role of decomposers in an ecosystem?
- Produce oxygen through photosynthesis
- Break down dead organic matter and recycle nutrients (Correct answer)
- Convert nitrogen gas into ammonia
- Transfer energy from producers to consumers
Correct answer: Break down dead organic matter and recycle nutrients
Decomposers like bacteria and fungi break down dead organisms, returning nutrients to the soil.
Question 3: Which organelle is responsible for producing ATP through cellular respiration?
- Nucleus
- Ribosome
- Mitochondria (Correct answer)
- Golgi apparatus
Correct answer: Mitochondria
Mitochondria are called the powerhouse of the cell because they generate ATP via cellular respiration.
Question 4: A population of rabbits grows rapidly with unlimited food. This best describes which type of population growth?
- Logistic growth
- Exponential growth (Correct answer)
- Linear growth
- Cyclical growth
Correct answer: Exponential growth
Exponential growth occurs when a population increases at a constant rate without resource limitations.
Question 5: What term describes the maximum population size an environment can sustainably support?
- Population density
- Biotic potential
- Carrying capacity (Correct answer)
- Ecological niche
Correct answer: Carrying capacity
Carrying capacity is the maximum number of individuals an environment can support given available resources.
Question 6: Which process moves water from the soil into a plant and eventually into the atmosphere?
- Transpiration (Correct answer)
- Precipitation
- Condensation
- Percolation
Correct answer: Transpiration
Transpiration is the evaporation of water from plant leaves, driving water uptake from the roots.
Question 7: Which blood cells are primarily responsible for fighting bacterial infections?
- Red blood cells
- Platelets
- White blood cells (Correct answer)
- Plasma cells
Correct answer: White blood cells
White blood cells (leukocytes) are the main immune cells that attack and destroy pathogens like bacteria.
ASVAB ASVAB General Science Biology and Ecology 4
Which type of symbiosis benefits one organism while the other is neither helped nor harmed?