Which s elhants and crickets have in common?
A. DNA nucleotides form the basis of inherited life, with cells that are formed spontaneously from the environment.
B. DNA nucleotides form the basis of all inherited life, with cells that are formed from other cells.
C. RNA nucleotides form the basis of all inherited life, with cells that are formed from other cells.
D. RNA nucleotides form the basis of inherited life, with cells that are formed spontaneously from the environment.
B. DNA nucleotides form the basis of all inherited life, with cells that are formed from other cells.
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Which substances are reabsorbed in the proximal convoluted tubule?
A. K+ ions B. Na+ ions C. HCO3- ions D. glucose E. All of the choices for this question are correct.
The sub-atomic particle with a positive charge is _____.
A. a neutron B. an isotope C. an electron D. a proton E. an ion
Which of the following respiratory structures are moist evaginations?
a. tracheal tubes b. lungs c. gills d. skin e. nasal passages
What stage of embryonic development implants in the lining of the uterus?
A. blastocyst B. zygote C. morula D. coelom