An embryo with a genital tubercle, urethral folds, and urethral groove must be
A) seven weeks old.
B) nine weeks old.
C) under seven weeks old.
D) unable to determine the age.
C) under seven weeks old.
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The genotypes and phenotypes that result from a cross of AA and Aa (A = normal pigmentation and a = albinism) are
A. phenotypes:all normal; genotypes:50% homozygous dominant and 50% heterozygous. B. phenotypes:50% normal and 50% albino; genotypes:all heterozygous. C. phenotypes:all albino; genotypes:50% heterozygous and 50% homozygous recessive. D. phenotypes:75% normal and 25% albino; genotypes:75% heterozygous and 25% homozygous.
Callie, a male domestic short haired cat, underwent a/an ____________________ to remove fluid (urine) from his urinary bladder
Fill in the blank(s) with correct word
Which of the following falls under the second line of defense?
A. Mucus B. Mucous membranes C. Tears D. Inflammation
Which of the following is a conducting zone structure?
A) respiratory bronchiole B) terminal bronchiole C) alveolar sac D) alveolar duct