A parabola has a vertex at the origin at (0,0). The equation of the directrix of the parabola is x=-4

In which direction does the parabola open?

A) Up

B) Down

C) Right

D) Left

A scientist hypothesized the temperature at which an alligator egg is incubaed will determine whether the alligator will be a male or female. What is the dependent?

Imagine that you are studying a very large population of moths that is isolated from gene flow. A single gene controls wing color. Half of the moths have white-spotted wings (genotype WW or Ww), and half of the moths have plain brown wings (ww).

Which type of marine ecosystem supports the least life and why?

A beaker is divided by a membrane that is permeable to water and impermeable to sodium ions. The sodium-water solution on side A is more concentrated than the sodium-water solution on side B.

A mother with type A and a father with blood type B had a child who was type O. What does that tell you about the blood types of the parents?

Which of these is NOT considered to be an organic substance? A) carbohydrates Eliminate B) lipids C) metals D) proteins

Which one of the following remains intact after extensive decomposition and can be used to assist in personal identification of remains? A. Blood B. Hair C. Bones D. Muscle structure

Which star has the highest absolute brightness?

What is the benefit or advantage of using spectral karyotype

A hypothesis that in non-falsifiable is?