Which of the following was Mendel’s
experimental organism?
a. pea plants
b. mustard plants
c. tobacco plants
d. corn plants
e. bean plants
A
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Place the following events in the order in which they occur for chemical synapse transmission
(1) Ca2+ enters axon terminal. (2) Ligand-gated ion channels open in postsynaptic membrane. (3) Neurotransmitter binds to postsynaptic receptor. (4) Action potential reaches axon terminal of presynaptic neuron. (5) Neurotransmitter released by exocytosis.
a. 4, 1, 5, 3, 2 b. 4, 3, 1, 5, 2 c. 4, 5, 1, 3, 2 d. 4, 1, 3, 5, 2 e. 4, 5, 2, 3, 1
The two major phagocytic cells of the body are
A. plasma cells and monocytes. B. B cells and T cells. C. mast cells and natural killer cells. D. macrophages and neutrophils. E. B cells and neutrophils.
S. aureus is gram negative
True or false
Scientistslearned that cell death is a normal and even important part of life by studying the development of the nematode worm C. elegans. What was the most important feature of C. elegans for the study of programmed cell death?
(a) The nematode is smaller and simpler than the fruit fly. (b) 70% of C. elegans genes have homologs in humans. (c) The developmental pathway of each cell in the adult worm was known. (d) Its genome was partially sequenced.