The structure of cells has changed significantly over time. What concept explains the presence of mitochondria in cells? a. Biogenesis c. Spontaneous generation b. Endosymbiosis d. Chemosynthesis

Why do the ingredients in a mixture maintain their physical properties?

What is the pathway of light? What is the pathway of sound? What is the pathway of blood?

If a dividing cell has centrioles what does this tell you about the cell

What's the independent and dependent variable in this sentence? "If students eat breakfast then they will have better scores on a test"

What would be an analogy for transcription and translation?

He phase of the cell cycle where dna replication, chromosome duplication and preparations for cell division occur is called

Why do you think phytoplankton are so important to all living things on earth?

The weakness of hydrogen bonds between the bases of DNA allows what?

Which statement is correct? The number of electrons of a neutral atom always equals the number of protons. The number of neutrons always equals the number of protons. The number of neutrons always equals the number of electrons.

How are animal and plant cells similar to a factory?