Biological fitness is best defined as
A) A heritable trait that increases the match of an individual to its environment.
B) Variability in the population for a trait that increases survival.
C) Relative the ability of an individual to produce offspring that survive and reproduce.
D) Competition among individuals for resources that allow them to have more offspring.
E) Similar reproductive success among individuals in a population.
Answer: C
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In plant cells, the middle lamella _____
A) allows adjacent cells to adhere to one another B) prevents dehydration of adjacent cells C) maintains the plant's circulatory system D) allows for gas and nutrient exchange among adjacent cells
d. The neurotransmitter opens ion channels in the dendrite’s plasma membrane.
a. The plasma membrane is depolarized, resulting in a decrease in the voltage across the neuron membrane. b. Sodium ions enter the neuron. c. An electrical signal is received by the dendrite, and it then travels passively to the neuron body. d. The neurotransmitter opens ion channels in the dendrite’s plasma membrane.
One problem with using common names is that
a. many organisms may have the same common name. b. many common names may exist for the same organism. c. the common name may vary by language and region. d. all of the above are true.
According to the first law of thermodynamics,
a. the energy of a system may increase if there is a corresponding decrease in energy elsewhere in the universe. b. the amount of energy in the universe is constant. c. chemical reactions do not create or destroy energy. d. energy can change from one form to another. e. all of these are true.