Radioactive isotopes have
a. excess electrons.
b. excess protons.
c. excess neutrons.
d. insufficient neutrons.
e. insufficient protons
C
Biology & Microbiology
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Vascular bundles primarily contain ________
a. pith and cortex b. epidermis c. parenchyma d. xylem and phloem
Biology & Microbiology
At a neuromuscular junction, the neurotransmitter released by the motor neuron is ________
a. epinephrine b. acetylcholine (ACh) c. serotonin d. dopamine
Biology & Microbiology
In which organelles can grana and thylakoids be found as structural components?
a. ribosomes b. mitochondria c. chloroplasts d. chromoplasts
Biology & Microbiology
Cats are an essential part of the life cycle of
a) Trypanosoma cruzi. b) Toxoplasma gondii. c) Plasmodium vivax. d) Leishmania donovani.
Biology & Microbiology