Early animated films were created by drawing every frame on a single sheet of paper, leading to a “jittery” look. 

Which of the following is often cited as the first hand-drawn animation on standard film, using techniques like drawing on a blackboard that changed between frames?

PG-13 was introduced in 1984 to accommodate films that straddled the line between PG and R.

Which of the following criteria is required for an area to be classified as a biodiversity hotspot according to Conservation International?

Sharks are being drastically over-fished in many populations world-wide.  What effect would you expect to occur if sharks were removed from an ocean ecosystem?

Which human activity most directly increases eutrophication in aquatic ecosystems?

In the case of a particular allele: when this allele is present as either a single copy or as two copies, the organism manifests a specific phenotype as the protein product performs its work in the cells.   This allele is not harmful when present either singly or as a pair.  Which of the following statements apply to this case?   

Which of the following are experiencing abnormally high rates of population decline and extinction in the last 50 years?  

In a study of the effects of mutant forms of p53 (a tumor-suppressor gene), it was found that the presence of a mutated allele (abnormal p53) shut down the normal tumor-suppressing abilities of the wildtype p53 allele – causing abnormal cell-growth as if there were no normal p53 present at all. This mutated form of p53 would be an example of what?  

Use the information given about the angle θ, 0 ≤ θ ≤ 2π, to find the exact value of the indicated trigonometric function. cos θ = , 0 < θ < Use double angle formula to find sin(2θ).