They're two types of variables, one being the responding the other being the controlled.
1-The controlled would be the light since the scientist would manipulate how much light the earthworm is given.
2- The responding would be the earthworm activity since it is reacting to the amount of light on it.
Salt reduces the amount of water in a solution, because you're introducing another molecule. If the water concentrations are different, the water is going to want to reach an equilibrium to balance itself out. Because the salt solution has a higher water concentration than the plant cell, the water will move into the cell to try and balance out the concentrations. If the salt solution had a lower water concentration (water potential) then water would move from the cell into the solution.
Answer:
The correct answer will be option-A.
Explanation:
The appendicular skeleton is the skeleton system of vertebrates which includes the bones of upper limbs, lower limbs and the shoulder girdles and pelvic girdles which attaches the upper limb and the lower limb.
The upper limb consists of the bones which help in grasping and manipulating the objects like the bones of arm, forearm, wrist and hand. The lower limb consists of the bones of thighs, legs and the feet which helps in the movement of the body.
Thus, option-A is the correct answer.
Mutualism, commensalism and parasitism
Question:
An organism that has been thriving, has died. Which of the following is NOT a cause of its demise?
Answer:
d.)appropriate environment