Why can mature plants be cloned to produce genetically identical copies?
A) Mature plant cells contain only a fraction of the genes found in an adult plant.
B) Plants have evolved over time to suit the need of human agriculture.
C) Mature plant cells can develop into all the specialized cells of an adult plant.
D) Scientists have engineered all plants to have this ability.
C
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The animal gut cavity may be a fully lined coelom or a partially lined __________
Fill in the blank(s) with the appropriate word(s).
The risk for Down syndrome increases in situations where the
A. mother is 20?29 years old. B. father is 35?50 years old. C. mother is 35?45 years old. D. father is 20?29 years old. E. both parents are 30?35 years old.
Which of the following cells could be created from a mitotic division but would not be created during a normal meiosis?
A) Cell G B) Cell H C) Cell K D) Cell M E) Cell P
Which of the following statements is an accurate description of neurotransmitters?
A) Each type of neurotransmitter receptor binds only a single molecule. B) Neurotransmitters all act by triggering a depolarization of membrane potential. C) Some neurotransmitters can bind to multiple different types of receptors. D) Once released from the synaptic terminal, neurotransmitters are permanently lost from the neuron. E) There are fewer than a dozen different neurotransmitters.