ASVAB ASVAB General Science Biology and Ecology 5 ā Questions and Answers
Question 1: Which level of biological organization is ABOVE an organism but BELOW a community?
- Biosphere
- Ecosystem
- Population (Correct answer)
- Biome
Correct answer: Population
A population consists of individuals of the same species living in the same area, between the organism and community levels.
Question 2: What is the correct order of nitrogen fixation in the nitrogen cycle?
- Atmosphere ā soil bacteria ā plants ā animals (Correct answer)
- Plants ā animals ā soil ā atmosphere
- Animals ā plants ā bacteria ā atmosphere
- Soil ā atmosphere ā plants ā animals
Correct answer: Atmosphere ā soil bacteria ā plants ā animals
Nitrogen-fixing bacteria convert atmospheric Nā into ammonia in the soil, which plants then absorb.
Question 3: A scientist discovers a new organism that has a cell wall but no nucleus. What kingdom does it most likely belong to?
- Fungi
- Plantae
- Monera (Bacteria) (Correct answer)
- Protista
Correct answer: Monera (Bacteria)
Prokaryotes like bacteria have cell walls but lack a membrane-bound nucleus, placing them in kingdom Monera.
Question 4: Which of the following is an example of a biotic factor in an ecosystem?
- Temperature
- Soil pH
- Predators (Correct answer)
- Rainfall
Correct answer: Predators
Biotic factors are living components of an ecosystem, such as predators, prey, and plants.
Question 5: During meiosis, how does the chromosome number in daughter cells compare to the parent cell?
- It stays the same
- It doubles
- It is halved (Correct answer)
- It is quartered
Correct answer: It is halved
Meiosis reduces the chromosome number by half to produce haploid gametes (sperm and eggs).
Question 6: Which biome is characterized by permafrost, very low precipitation, and dominated by mosses and lichens?
- Taiga
- Tundra (Correct answer)
- Desert
- Temperate grassland
Correct answer: Tundra
The tundra biome has permanently frozen subsoil (permafrost), minimal precipitation, and sparse vegetation like mosses and lichens.
Question 7: What is the term for the variety of species living within a particular region or ecosystem?
- Genetic diversity
- Biodiversity (Correct answer)
- Biomass
- Abundance
Correct answer: Biodiversity
Biodiversity refers to the variety of species, genes, and ecosystems within a given area.
ASVAB ASVAB General Science Biology and Ecology 5
Which level of biological organization is ABOVE an organism but BELOW a community?