A group of short interspersed elements (SINEs) in primate DNA; not relevant to plants.

A repetitive DNA sequence found in primates; not found in plants.

Analogous repetitive sequences in non-primate genomes; relevance to plant genomes is minimal.

A metal that can be toxic to plants in acidic soils, inhibiting root growth and nutrient uptake.

Air sacs in lungs of animals; not present in plants.

A hydrocarbon containing a carbon–carbon triple bond; rare in plant biochemistry.

An embryonic membrane in vertebrates; not found in plants.

Insect hormones produced by the corpora allata; not applicable to plant biology.

The relative frequency of an allele in a population; important in plant population genetics and breeding.

Different forms of a gene that can exist at a specific locus; important in plant genetics.