A Gardener Is Constantly Struggling with the Growth of Weeds

question 24

Multiple Choice

A gardener is constantly struggling with the growth of weeds in his perennial flower beds. At the start of the growing season one year, he sprays an herbicide to reduce the number of weeds. Although the herbicide kills many of the weeds, some develop resistance to the herbicide and continue to grow and spread among his flowering plants. After a few years, the gardener decides to stop all herbicide applications. One of the changes that he notices is that the weeds that have resistance to herbicides grow much more slowly and are easily outcompeted by other weeds when no pesticides are sprayed (i.e., the herbicide-susceptible weeds produce more seeds and quickly overtake some of the areas in the garden where the herbicide-resistant weeds had been growing) . In a single individual, how might herbicide resistance occur?

• A) natural selection
• B) development of a mutation in a gene
• C) evolution of a specific gene
• D) sharing of alleles among individuals in a population

Grasp the economic impact of franchised businesses, including job creation.

Comprehend the process and benefits of becoming a franchisee.

Identify the significant advantages and challenges for both franchisors and franchisees.

Learn about the legal and operational documentation involved in franchising.

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Definitions:

Mechanoreceptors

Sensory receptors sensitive to mechanical pressures or changes, involved in sensations such as touch, pressure, and sound.

Meissner Corpuscles

Specialized nerve endings in the skin responsible for sensitivity to light touch.

Two-Point Discrimination

The ability to discern two separate points of contact on the skin, a measure of tactile sensory resolution.

Dermal Papillae

Small, nipple-like extensions of the dermis into the epidermis that increase surface area for oxygen and nutrient transfer between these layers.