A mule is an example of an exception to which of the fundamental characteristics of life?
A) response to environment?mules cannot respond to changing environmental conditions and that is why they are stubborn
B) evolutionary adaptation?because mules are sterile they cannot evolve and adapt
C) growth and development-mules being sterile do not grow and develop like other life forms
D) reproduction?a mule is sterile and cannot reproduce even though it is the product of reproduction between two closely related animals (a horse and a donkey)
D
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A heavy meterstick has mass m. When the meterstick is thrown like a spear past you at speed v, you measure its momentum to be 2mv. What do you measure its length to be?
A) 1 m B) 0.87 m C) 0.5 m D) 0.25 m E) none of the above
This photo shows the central region of a cluster of galaxies. Based on what you have learned from your text, which of the following statements about this photo is not true?
A) The oldest stars in these galaxies are much older than the oldest stars in our own Milky Way. B) Half for more of the large galaxies we see in this photo are elliptical galaxies. C) Many of the galaxies in this photo have probably suffered collisions in the past. D) These galaxies are held together by their mutual gravitational attraction.
Magnet A has twice the magnetic field strength of magnet B and pulls on magnet B with a force of 100 N. The amount of force that magnet A exerts on magnet B is
A) about 50 N. B) exactly 100 N. C) more than 100 N. D) not enough information
Two identical masses are attached by a light string that passes over a small pulley, as shown in Figure 6-6. The table and the pulley are frictionless. The masses are moving
A. with an acceleration equal to g. B. with an acceleration less than g. C. with an acceleration greater than g. D. at constant speed. E. with an acceleration that cannot be determined without additional information.