A phylum of marine invertebrates, which includes acorn worms and pterobranchs, that are characterized by a body divided into three regions: proboscis, collar, and trunk.

An order of insects characterized by incomplete metamorphosis, where the young (nymphs) resemble adults but lack wings.

Referring to insects that undergo incomplete metamorphosis, where nymphs gradually develop into adults without a pupal stage.

A type of parasitism where the parasite derives some of its nutrients from the host but is also capable of photosynthesis, such as mistletoe.

An individual with only one copy of a gene, typically used to describe males for X-linked genes, as they have only one X chromosome.

Having only one copy of a gene, typically referring to males with only one X chromosome for X-linked genes.

A gene present in a single copy in a diploid organism, typically referring to genes located on sex chromosomes in males.

A substance that causes hallucinations or altered states of perception, often affecting mental and sensory experiences.

The chemical reaction in which a halogen atom (such as chlorine or bromine) is added to a compound.

A type of chemical compound containing carbon and halogens, commonly used as a fire suppressant.