From which plant are flax fibers obtained?

In the equation $log\ S = log\ C + Z\ log\ A$,what does $C$ represent?

Which of the following animals possesses a four-chambered heart?

The $pH$ of $0.05 \ M$ acetic acid is $(K_a = 2 \times 10^{-5})$

What type of life cycle in plants is indicated by the given figure?

The equation of the straight line perpendicular to the straight line $3x + 2y = 0$ and passing through the point of intersection of the lines $x + 3y - 1 = 0$ and $x - 2y + 4 = 0$ is