Which of the following lists the levels of biological organization in order from simplest to most complex?
a. cell, cardiac muscle, heart, cardiovascular system, human
b. cardiac muscle, cell, human, heart, cardiovascular system
c. heart, human, cell, cardiac muscle, cardiovascular system
d. cell, heart, human, cardiovascular system, cardiac muscle
e. human, heart, cardiovascular system, cardiac muscle, cell
Ans: a. cell, cardiac muscle, heart, cardiovascular system, human
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Target nucleic acid amplification (polymerase chain reaction [PCR]) methods are based on:
a. the ability of two nucleic acid strands that have complementary base sequences to bond specifically with each other and form a double-stranded molecule. b. detecting phenotypic traits not detectable by conventional strategies. c. the principles of complementary nucleic acid hybridization with those of nucleic acid replication that are repeatedly applied through numerous cycles. d. determining the exact nucleotide sequence of a gene or gene fragment obtained from an organism.
Prostaglandins may act as local signaling molecules in the uterus, causing ________
Fill in the blank(s) with correct word
Interneurons connect sensory and motor neurons
Indicate whether the statement is true or false
In a vertebrate with a four-chambered heart, the structure(s) containing blood with the highest O2 concentration is/are the ________.
A. inferior vena cava B. pulmonary veins C. right atrium D. right ventricle E. pulmonary arteries