The hearts of a fetal pig and a human are similar in that they are
(a) the primary pump of the circulatory system of the body.
(b) both four chambered.
(c) composed of cardiac muscle tissue.
(d) all of the above.
(d) all of the above.
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The internal body fluids of an osmoconformer can best be described as having:
A. roughly the same total solute concentration as the external environment. B. a higher solute concentration than the external environment. C. a lower solute concentration than the external environment. D. all of the same concentrations of particular ions as the external environment. E. None of the answer options is correct.
A paralog ____________
A. is found for every gene in mammals B. is only found on the X but not the Y chromosome C. can explain the lack of phenotype for a gene knockout D. cannot be mutated E. has the same DNA sequence as the original duplicated gene
The lining of the uterus that is lost and replaced on a monthly basis in the form of menstrual fluid and serves as the site of implantation. _____
A) Endometrium
B) Testis
C) Cervix
D) Uterus
E) Oviduct
F) Ovaries
G) Vagina
H) Seminal vesicle
I) Penis
J) Prostate gland
K) Vas deferens
L) Glans penis
Two microbiology students performed the viable plate count exercise, as described in this lab manual. Both students performed the procedure using the same sample of pasteurized milk, however their final coliform and total bacterial colony counts varied greatly. Which of the following scenarios could have caused this variation?
A) Improper dilutions B) Not mixing the milk before dilutions C) Nonsterile water used for dilutions D) Spreading the inoculum with a sterile spreader that had not cooled E) Immediately inverting the inoculated plates F) All of the above