Which can be found in both viruses and living organisms? A) Mitochondria
B) Chloroplasts
C) Nuclei
D) DNA ​

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

Photosynthesis converts solar energy into what type of energy?

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis