Answer:
Muscle cells are most likely affected by the poison.
Changing only one variable at a time is a rule for conducting a controlled
experiment.
Controlled experiment involves the use of dependent and independent
variables . Changes in the independent variable brings about a
corresponding change in the dependent variable which is then recorded.
It is however important to note that changing more than only one variable at
a time won't accurately determine if the changes in the results were as a
result of one cause. This is why only one variable has to be changed at a
time.
Read more about Hypotheses here brainly.com/question/12416923
It's a hamstring injury. The hamstrings are the three posterior thigh muscles: semimembranosus, semitendinosus and biceps femoris. All three of them <span>cross the hip and the knee joint and because of it, they help with the knee flexion and hip extension (straightening). </span>
She can do an experiment by purchasing the top soils she think will work. Then she must take care of each plant exactly the same way. the only thing that will be different is the soil. If she waits for a couple of weeks she can observe each flower and see which one turned out best and use that soil that was used in her best flower.
Vitamin D mostly helps the body absorb calcium (which we need for strong bones) and helps keep immune systems strong. Vitamin D deficiency leads to more flu and colds, fragile bones, weak muscles, high blood pressure and depression. Deficiency can lead to hundreds of diseases.
Hope this helps! :)