The two main variables in an experiment are the independent and dependent variable.
An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable.
A dependent variable is the variable being tested and measured in a scientific experiment.
The dependent variable is 'dependent' on the independent variable. As the experimenter changes the independent variable, the effect on the dependent variable is observed and recorded.
For example, a scientist wants to see if the brightness of light has any effect on a moth being attracted to the light. The brightness of the light is controlled by the scientist. This would be the independent variable. How the moth reacts to the different light levels (distance to light source) would be the dependent variable.
When results are plotted in graphs, the convention is to use the independent variable as the x-axis and the dependent variable as the y-axis.
Answer:
Usually, the larger the seed, the more food reserves it contains. ... For example, Dandelion seeds have developed very light and fluffy parachute-like structures. These help the seeds to float in the wind and delays their fall to the ground. This delay allows the seeds to be carried further.
Let us look at the what, why and how of studying extreme places like the deep earth and the deep space. Scientists need to figure out as to 'what' they want to look at such places, be it a new exotic creature or bio-genesis (birth of life). Unless there are several testable hypothesis constructed, such a study cannot begin. The 'why' aspect deals with the purpose of such research and expeditions. Is it of any use to the humans, or will it improve our current understanding of a phenomenon? The 'how' aspect deals with the technology and the economic assistance that can help in undertaking such a research. All these are the challenges that needed to be thoroughly considered to make such a research or expedition possible.
A dissection microscope<span> is light illuminated. The image that appears is three </span>dimensional<span>. It is used for dissection to get a better look at the larger specimen. You cannot see individual cells because it has a low magnification. Or just call it a dissecting microscope</span>
Answer: Option A) Cells
Explanation:
The soft lining inside the mouth is an example of cell.
The inner lining of mouth is made up of the mucous membrane. Soft lining is consist of squamous epithelium also called as oral epithelium, which is a type of cell.
Epithilial cells are arranged in layers upon a basal membrane. It function to protect mouth against abrasion.
Hence the correct option is A) cells.
