Recessive genes are usually expressed in humans only when ________
A) the organism is in the embryonic stage
B) they are coding for skin color
C) they are coding for genetic diseases
D) both alleles are exactly the same, or homozygous
D
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Which of the following hormones are released in response to decreases in blood glucose concentration?
a) Insulin b) Luteinizing hormone c) Glucagon d) Parathyroid hormone e) Calcitonin
Which of the following is a solid structure?
A) medullary cavity B) lacuna C) central canal D) canaliculus E) trabecula
Enamel is found in the:
a. root of the tooth b. crown of the tooth c. neck of the tooth d. all of the above
What is a type of paracrine that is a collection of protein signal molecules secreted by cells of the immune system, largely acting locally to regulate immune responses?
a. cytokines b. eicosanoids c. peptides d. enzymes e. white blood cells