Polar attractions are
What will be an ideal response?
(a) forces between atoms with partial charges.
(b) weaker than covalent bonds.
(c) important because they are numerous.
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______________________ is the reproductive strategy of all Pacific salmon that breed only once and die shortly after
Fill in the blank with the correct word.
Semen contains all of the following components EXCEPT:
a. Sperm b. Epididymal fluid c. Prostatic fluid d. Bulbourethral fluid e. Seminal fluid
Why does the reflux of gastric contents into the esophagus occur?
a. increased amounts of mucous produced by the stomach. b. increased hydrochloric acid production by the parietal cells. c. relaxation of the cardiac sphincter. d. spasms of the submucosal layer of the stomach wall. e. contraction of the pyloric sphincter.
The size of morula is about the same size as the original zygote.
a. true b. false