Check Which statement accurately describes the levels of organization?
O A group of cells that work together to performa common function is called an organ.
O A group of tissues that work together to perform a common function is called an organ.
O A group of tissues that work together to performa common function is called a cell.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

The biosphere of the earth is made up of what compound? organic or inorganic?

What is the source of continuous heat and energy that we receive from the sun