Answer the question using the accompanying figure. The electrons at the lowest energy level in the neon atom
depicted are found in which orbital?
a. 1s
b. 2s
c. 2px
d. 2py
e. 2pz
ANSWER: a
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Antibody-producing cells in humans are called ________
A) macrophages B) plasma cells C) T cells D) NK cells E) hybridoma cells
Evolution occurs in
A. individuals. B. communities. C. species. D. genotypes. E. alleles.
If a physician wanted to collect spinal fluid for analysis s/he would want to place a needle between the:a
dura mater and skull. b. dura mater and pia mater. c. arachnoid and pia mater. d. pia mater and brain. e. dura mater and arachnoid.
Pseudocoelomate nematodes lack a body cavity.
A. Incorrect; their body cavity is fully enclosed by ectoderm but is a functional body cavity. B. Correct; they are solid from the gut to the cuticle. C. Incorrect; although not fully enclosed by mesoderm the pseudocoel is a body cavity. D. Correct; their pseudocoel does not allow for the development and expansion of organs.