In Using Control by Natural Enemies of Pests,from the Ecological

question 51

Multiple Choice

In using control by natural enemies of pests,from the ecological perspective it is best to

• A)import enemies from abroad or from distant ecosystems to have the highest kill rate.
• B)select enemies that have a very broad range of pest prey or hosts.
• C)couple this method with intensive broad-spectrum pesticide spraying.
• D)select enemies that are local and have a narrow specificity for the pest in question.

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Definitions:

Triploid

An organism or cell having three sets of chromosomes, often resulting from the fertilization of an egg by two sperm, or a combination of a diploid and haploid organism.

Polar Nuclei

Two nuclei in the ovule of flowering plants that fuse with one sperm cell during double fertilization to form the triploid endosperm, nourishing the developing embryo.

Endosperm Tissue

A tissue in seed plants where nutrients are stored, providing nourishment to the developing embryo.

Seed Dispersed

The process by which seeds are spread from the parent plant to new locations for germination and growth.