Answer:
A. Lightning
Explanation:
Nitrogen is very fundamental for a wide range of life activities in both plant and animals.
Lightning which accompanies thunder during rain storm and other weather phenomenon aids the release of atmospheric nitrogen for life processes. The energy that accompanies a lightning event is mostly electrical in nature. This electrical energy is huge and very massive. As the lightning interacts with free nitrogen molecules in the atmosphere, the molecule is broken down. The free nitrogen which results then combines with oxygen in the atmossphere to form oxides of nitrogen. When oxides of non-metals dissolves in rain water, they make the water rich in nitric acid and can be brought to the biosphere for use by plant and animals.
Answer:
The correct answer would be - the number of times the student was able to squeeze the clothespin or rate of clothespin squeezing.
Explanation:
The dependent variable is the variable that depends on the change in the independent variable and measured or needs to be found in a scientific experiment or investigation.
In this experiment, the independent variable would be an exercise to found the effect on the change of the rate of clothespin squeezing or the number of times the students are able to squeeze the clothespin.
Thus, the correct answer would be - the rate of clothespin squeezing.
Eukaryote cells:
-has a nucleus
-tends to be multicellular (consisting of many cells)
-meiosis + fusion of gametes (sex cells)
-have mitochondria (powerhouse of the cell)
eg) animal and plant cells
Prokaryote cells:
-no nucleus (or membrane-bound nucleus)
-tends to be unicellular (consisting of one cell)
-no mitochondria
-partial meiosis
eg) bacteria and archaea
