The ability to reproduce is a defining characteristic of life, while the others may not apply to all living organisms.

Annelids, such as earthworms, are characterized by their segmented bodies, which is a defining feature of this phylum.

The kingdom Animalia is defined by multicellular and heterotrophic organisms.

Annelids, such as earthworms, are characterized by their segmented bodies.

Mollusca includes soft-bodied animals, many of which have a hard shell for protection.

Nematodes, or roundworms, are characterized by their cylindrical, elongated body shape.

Food availability is a density-dependent factor because its effect on population growth changes with population density.

Loss of biodiversity leads to a loss of ecosystem resilience, making ecosystems more vulnerable to changes.

All of the above options are direct threats to biodiversity, affecting species and ecosystems.

Asexual reproduction lacks genetic variation, which can make populations more vulnerable to diseases and environmental changes.

HIV/AIDS is caused by the Human Immunodeficiency Virus (HIV), which is a virus.

All of these factors influence the rate of transpiration in plants.

Algae are primarily characterized by their ability to perform photosynthesis using various pigments, but they do not have true roots or vascular tissues.

Angiosperms are characterized by producing seeds, having vascular tissues, and producing flowers.

Bryophytes are non-vascular plants that typically thrive in moist habitats.

Dicots are characterized by having two cotyledons and net-like venation in their leaves.

Dicotyledons are characterized by having two seed leaves (cotyledons) and net-like venation in their leaves.

External fertilization typically occurs in aquatic environments where sperm and eggs are released into the water.

Fungi have chitin in their cell walls, distinguishing them from plants.

Internal fertilization occurs inside the female's body, providing protection to the developing embryo.

Living organisms have the ability to reproduce, which is a key feature of life.

Monocots are characterized by having parallel leaf venation and one cotyledon.

Monocotyledons are characterized by having parallel venation in their leaves.

Multicellular organisms have a complex structure with differentiated cells.

Non-vascular plants, such as bryophytes, depend on water for reproduction as they require water for sperm to swim to the egg.

Prokaryotic cells have circular DNA and lack a true nucleus.

Sexual reproduction involves two parents and results in genetic variation among offspring.

The kingdom Animalia consists of multicellular and heterotrophic organisms.

Plants have cell walls made of cellulose and are primarily autotrophic.

The kingdom Protista consists of eukaryotic organisms that are mostly unicellular.