During trenching operations, spoil piles are placed too close to the trench edge. The controls of engineering – relocate spoil piles 2 ft away, and administrative – assign a competent person to inspect trench safety daily, should be implemented.

Workers are exposed to heat stress while working on a roof in July. Choose three control levels that could be implemented.

Workers mix a two-part epoxy adhesive that releases hazardous vapors. Which control follows the hierarchy most effectively?

Using PPE should always be the first step in protecting workers from a hazard.

Employees are exposed to dust from concrete cutting operations. Which controls represent engineering?

A painter must use a ladder to reach an elevated surface. He should use an engineering control —such as a mobile scaffold —and an administrative control —such as ladder safety training.

Mollusks are one of the most evolutionarily successful animal phyla, exhibiting remarkable diversity in body form, habitat, and behavior—from sedentary filter-feeding bivalves to highly active, intelligent cephalopods. Discuss the structural and physiological adaptations that have allowed mollusks to occupy such a wide range of ecological niches. In your answer, explain how variations in the molluscan body plan (including the foot, mantle, shell, nervous system, and circulatory system) reflect their evolutionary relationships, lifestyles, and habitats. Support your discussion with examples from at least three different molluscan classes (include the class with the organism)

 For a patient suffering from a major hemorrhage, what is the most desirable fluid replacement? 

Do plants carry out cellular respiration?

IMG_7789.jpeg What is the name of this piece of equipment shown here? Answer: