In multi-story reinforced concrete construction, slabs apply loads to joists, which in turn load columns, which in turn load beams, which in turn load the foundation.

Undesirable vibrations is an example of a _______.

Spread footings distribute column loads over an area of soil sufficient to prevent overloading of the soil.

Serviceability limit states are generally considered risks for collapse.

The construction of cast-in-place structures involves construction of forms, removal of forms, and propping or shoring of the new concrete until its strength is adequate to support its own weight.

Beam widths and depths and column sizes are generally varied in _______ increments.

It is generally more economical to use the same sizes of beams, slabs and columns for multiple floors because _______.

Formation of a plastic mechanism is an example of a _______.

Imagine you are an ecologist studying two species of frogs in the same wetland. Species X has a mating call that only operates at low frequencies, while Species Y produces a call at high frequencies. Additionally, Species X is nocturnal, while Species Y is active during the day. a. Identify and explain the types of pre-zygotic barriers that are likely preventing these two species from interbreeding. Provide specific examples from the scenario to support your answer. (3 marks) b. Propose one potential example of a founder effect that could further influence the genetic divergence of these two species over time. Use and describe the appropriate terminology from class. (2 marks)

Fatigue is an example of a _______.