An organism that invests energy primarily in growth, likely lives in
a. an aquatic environment
b. a terrestrial environment
c. a safe environment
d. a risky environment
e. I don't know the answer
Answer: c. a safe environment
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In agarose gel electrophoresis, DNA molecules move towards the ____ pole because they ____
a. positive; are negatively charged
b. negative; are positively charged c. bottom; are pulled by a magnetic force d. bottom; are pulled by gravity e. bottom; have a greater density than the gel
In poultry, the genes for rose comb (R) and pea comb (P) produce walnut whenever they occur
together (R__ P__); single-combed individuals have the homozygous condition for both genes (rr pp). (a) Give the F1 and F2 phenotypic results of a cross of a pure-breeding rose comb (RR pp) with a pure-breeding pea comb (rr PP). (b) Give the phenotypic results of a cross of Rr Pp ? rr Pp. (c) Give the phenotypic results of a cross of RR Pp ? rr Pp. (d) Give the phenotypic results of a cross of Rr pp ? rr Pp. (e) Give the phenotypic results of a cross of Rr Pp ? rr pp. What will be an ideal response?
Which of the following is true of iron sources and functions?
a. The only dietary sources of iron are meat, fish, and poultry. b. Myoglobin and hemoglobin contain equal amounts of iron. c. Heme iron is always better absorbed than non-heme iron. d. The body cannot recycle iron for other uses.
A pregnant woman comes into the hospital past her due date. The doctor decides it is time for the baby to be delivered. Before performing a cesarean section, the doctor wants to try to induce labor
Which of the following would she most likely inject? A) progesterone B) luteinizing hormone (LH) C) follicle-stimulating hormone (FSH) D) oxytocin