The principle of conservation of mass is true only for reactions that take place in closed systems.

True or false: A substance will float in water if it has a mass greater than its volume

Which of the following eventually resulted in Niagara Falls love canal neighborhood been declared a federal emergency in 1978? A) Oil drilling in the area had destroyed its ecosystem B).

State one way that animal cells differ from the cells of plants and fungi. What is the significance of this difference?

When the solution concentration on the outside of a cell is greater than the solution concentrate on the inside of the cell, what type of solution is the cell within? A. Hydrotonic B. Hypertonic C. Hydratonic D. Hypotonic

What is likely to happen if you only offer generic attributes and qualities as examples of your qualification for a position?

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?