Kapitel 15 popu
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Plants often react to attacks on their leaves, stems, fruit, or seeds by forming abnormal structures called ________. | Galls. (En galle er en svulstagtig dannelse fremkaldt af forskellige, parasitiske organismer, som lever på planter. Gallen består af væv, som planten har skabt under påvirkning fra den organisme, som lever inde i den). |
A relationship between two species in which both species benefit is called ________. | Mutualism. (Mutualistisk=gensidig fordel. Parasitisk=ensidig fordel. Obligat= Kan ikke gennemføre livcyklus uden den anden part). |
The mutualistic fungi that can live within the roots of certain plants are called ________. | Mycorrhiza |
How are fleas (lopper) transmitted between hosts? | Via direct transmission. (Andre former kunne være through mutiple hosts, eller via an intermediate vector (hosts)). |
Plant parasites that are photosynthetic but draw water and nutrients from their host plant are referred to as | Hemiparasites (fx orkide) |
What does this figure explain? | High intensity infection leads to more conspicuous behavior. |
How might ants on an acacia tree serve in a mutualistic relationship? | The ants fight off potential herbivores. |