Neurotransmitters are removed from the
synaptic cleft by
a. diffusion.
b. enzymatic degradation.
c. active pumping back into the neuron.
d. all of these.
e. b and c only
D
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To conduct a phylogenetic analysis, we need an outgroup to:
A. decide which characters are analogous and which are homologous. B. determine which character states are ancestral and which are derived. C. determine which characteristics to include in our analysis. D. decide which molecular data to use. E. All of the answer options are correct.
Which type of plant hormone has been shown to both promote pollen tube elongation and inhibit root
elongation?
a. jasmonates b. ethylene c. brassinosteroids d. salicylic acid e. oligosaccharins
Which is not true of placoderms?
a. They gave birth to live young. b. They had jaws. c. They had teeth. d. They had paired pelvic fins. e. They had paired pectoral fins
What is the duct within the kidney that collects urine?
A) ureter B) renal vein C) bladder D) renal pelvis