If a person is highly alert, anxious, and has loss of fine motor control, which psychoactive drug have they most likely
taken?
a. a narcotic analgesic
b. a stimulant
c. a depressant
d. a hallucinogen
e. an endorphin
ANSWER: b
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What is the result of recombination (crossing over) during meiosis?
A) It allows the cell to complete DNA replication. B) It ensures retention of genetic information and helps to preserve cell characteristics. C) It eliminates unused genes by removing them. D) It binds homologous chromosomes tightly, so they do not accidentally separate. E) It creates chromosomes that are a new combination of paternal and maternal material.
What factor(s) typically influence a trait that shows continuous variation?
A) genetic factors only B) environmental factors only C) both genetic and environmental factors D) neither genetic nor environmental factors
Which of the following provides long-term energy storage for plants?
A) ATP B) Cellulose C) Starch D) Glycogen E) Glucose
Euglenids have an organelle known as a(n) ________ which has a role in their phototactic behavior.
A. mitosome B. kinetoplast C. eyespot D. apical complex E. parabasal body