In order to conduct a research you should have an dependent variable, independent variable and the control variable. so in order to study phototropism, then you should need sun light and the growth of the plant and you must have a control that why you need a dark room.
I think this is correct
1. Organelle, cells, tissues, organs, organ systems, organisms, population, communities, ecosystems and finally biosphere.
2. (Human Body) Bone cells, Fat cells, Nerve cells.
3. neuron, a collection of neurons, nervous system, brain
4. Plants don't have a liver, stomach or lungs, while animal organ systems do.
Answer:
the process which includes as growth, differentiation, respiration, digestion, and excretion during their life time is life process.
The upper layer of the Earth
Answer:1 is a
Explanation: the yellow tail snappers will grow larger in numbers cause their natural preditor is gone
Ps finish the second problem and I'll anwser it too
