Correct answer: C) Concentration gradient
The process of movement of a particle in a solution from the region of higher concentration to the region of lower concentration across a membrane is called as concentration gradient.
For example: If we drop a few drop of dye in a glass of water, it will diffuse along a concentration gradient, i.e, the region where dye is found in highest concentration to the region where it is in lower concentration.
It will occur until the concentration of dye become uniform in all the direction in the glass of water.
Ovulation is the process in which eggs are released from the ovary.
Air pressure (inside the lungs) is lowest when lung volume is highest, so the answer is B. when you breathe in your lungs expand, which makes the air molecules spread out, therefore the pressure is lower.
Incorrect and false
Humans have innate behaviors and these are exhibited as instinctive behaviors that acts as an impulse, drive or impetus without a rational guidance. These are survival behaviors that aid to the individual's own growth in the harsh environment.
I would go with D, speaker. A poem is written by an author, but the author isn't always the speaker.
