A neuron sums all inhibitory and excitatory signals through ________

a. interneurons
b. breakdown or reuptake of neurotransmitters
c. threshold potential
d. synaptic integration


d

Biology & Microbiology

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In seedless plants, ____ in each megasporangium produces ____ megaspores that are released to the environment

when the mature megasporangium opens.

a. mitosis; two b. meiosis; two c. meiosis; four d. meiosis; eight e. mitosis; four

Biology & Microbiology

Which of the following is not true of extended-spectrum beta-lactamases (ESBL) and gram negative bacilli?

A) Due to mutations in a bacteria's original chromosome B) Should be included in the susceptibility testing for all of Enterobacteriaceae C) Usually susceptible to carbapenems, cephamycins, and beta-lactamase inhibitors D) ESBLs destroy carboxypenicillins, ureidopenicillins, aztreonam, and cephalosporins

Biology & Microbiology

Sandy could be very disruptive in her first-grade class. She sometimes would scream and use foul language when she was frustrated; she mostly kept her hands to her side while interacting with her friends in the playground; and she would stare right into

the eyes of her teacher when he was explaining lessons. Her teacher, at his wit's end, complained to the principal that Sandy was autistic. Do you agree or disagree with the teacher? Explain your answer. What will be an ideal response?

Biology & Microbiology

What are Group I and Group II introns, where are they found, and what makes them different from other introns?

What will be an ideal response?

Biology & Microbiology