The cell theory states that all organisms consist of one or more cells, the cell is the basic unit of life, and all cells arise from existing cells. This is a scientific theory. How could the cell theory be disproven?
What will be an ideal response?
Like all hypotheses, a scientific theory can be disproven by one observation or result that is inconsistent with it.
Therefore, if a scientist discovered a living organism that did not consist of a cell or if they discovered a cell that spontaneously formed on its own, the theory would be disproven.
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In order for a substance to sustain a fission chain reaction, one important condition is that
A) each fissioning nucleus must release a sufficient number of neutrons. B) the nuclei must collide with enough energy to overcome the electrical repulsion between them. C) each fissioning nucleus must release a sufficient number of alpha-particles. D) energy must be continually supplied from the outside. E) the nuclei must stay in shape by maintaining a regular jogging program.
A puck with a mass m1 = 50 g moving at 1.0 m/s approaches a stationary puck with a mass m2 = 100 g on a frictionless air table,
and they undergo a sudden two-dimensional elastic collision. After the collision, both pucks have identical speeds, but travel in different directions. What is the angle between the original and final paths of puck with mass m1? A) 30° B) 60° C) 90° D) 120° E) 150°
If your pupils have a diameter of about 5 mm, about how many times more light gathering power does a telescope with a diameter of about 20 cm (8 inches) have than your pupils?
A. 4 times B. 160 times C. 16 times D. 40 times E. 1,600 times
Constant Acceleration Kinematics: A car with good tires on a dry road can decelerate (slow down) at a steady rate of about 5.0 m/s2 when braking. If a car is initially traveling at 55 mi/h(a) how much time does it take the car to stop?(b) what is its stopping distance?
Fill in the blank(s) with the appropriate word(s).