Which one of the following does not match a component of the amniotic egg with its primary function?
A. Shell-porous, protective covering
B. Yolk sac-provides food for the embryo
C. Allantois-segregates nitrogenous wastes from embryo
D. Chorion-exchange of respiratory gases; retention of water
E. Amnion-encloses embryo within an oxygen-filled cavity
Answer: E
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Which hormones are made in the ovaries?
a. estrogen and progesterone b. follicle-stimulating hormone c. oxytocin and estrogen d. prolactin e. leutinizing hormone and progesterone
Nitrogen __________ by bacteria in root __________ gives a plant extra nitrogen. Fill in the blank(s) with the appropriate word(s)
The order of gene transfer in an Hfr × F? mating is best represented by ________.
A. the chromosome followed by the plasmid B. part of the plasmid followed by the chromosome followed by the rest of the plasmid C. part of the chromosome followed by the plasmid followed by the rest of the chromosome D. all plasmid genes followed by some or all of the chromosome
Haploid sex cell; e.g., egg or sperm.
What will be an ideal response?