Recall that light can be emitted from an atom when the atom loses energy. Which of the following processes is responsible for this production of light?
a. An electron moves closer to the nucleus of the atom.
b. An electron moves farther away from the nucleus of the atom.
c. An electron orbits the atom.
d. A proton is released from the nucleus of the atom.
e. The proton comes into close contact with a neutron of another atom.
Ans: a. An electron moves closer to the nucleus of the atom.
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Which of the following is an example of evolution that can be observed and studied?
A. resistance of HIV to drug treatment B. resistance of weeds to select herbicides C. bacterial resistance to antibiotics D. All are examples of evolution that can be observed and studied.
Assuming that they all belong to the same plant, arrange the following structures from largest to smallest
1. antheridia 2. gametes 3. gametophytes A) 2, 3, 1 B) 2, 1, 3 C) 3, 2, 1 D) 3, 1, 2
Paedomorphosis may involve:
a. acceleration or hypermorphosis. c. acceleration or neotony. b. progenesis or neotony. d. progenesis or hypermorphosis.
A child has O type blood. The mother has AB blood type and the father has A blood type. Which is true?
a. This can't be biological mother b. This can't be biological father c. The children only have AB from these parent d. Neither of these can be the child's parents