Answer: i would say the independent variable is the soil and the control variable is the seed because it stays the same in all of them to better understand the experiment while the dependent variable is the fertilizer.
Explanation: i am not completely sure but maybe someone else can also answer to verify it first
B-Kidneys
The kidneys act as filters that strain urea and excess salts from the bloodstream to release them in the urine.
Answer:
Plants have evolved several adaptations to life on land, including embryo retention, stomata, and vascular tissue
ANSWER:C) farming and hiking
