ASVAB General Science Biology and Ecology Flashcards

Which level of biological organization is ABOVE an organism but BELOW a community?

Answer: Population

A population consists of individuals of the same species living in the same area, between the organism and community levels.

What is the correct order of nitrogen fixation in the nitrogen cycle?

Answer: Atmosphere → soil bacteria → plants → animals

Nitrogen-fixing bacteria convert atmospheric N₂ into ammonia in the soil, which plants then absorb.

A scientist discovers a new organism that has a cell wall but no nucleus. What kingdom does it most likely belong to?

Answer: Monera (Bacteria)

Prokaryotes like bacteria have cell walls but lack a membrane-bound nucleus, placing them in kingdom Monera.

Which of the following is an example of a biotic factor in an ecosystem?

Answer: Predators

Biotic factors are living components of an ecosystem, such as predators, prey, and plants.

During meiosis, how does the chromosome number in daughter cells compare to the parent cell?

Answer: It is halved

Meiosis reduces the chromosome number by half to produce haploid gametes (sperm and eggs).

Which biome is characterized by permafrost, very low precipitation, and dominated by mosses and lichens?

Answer: Tundra

The tundra biome has permanently frozen subsoil (permafrost), minimal precipitation, and sparse vegetation like mosses and lichens.

What is the term for the variety of species living within a particular region or ecosystem?

Answer: Biodiversity

Biodiversity refers to the variety of species, genes, and ecosystems within a given area.