Shark brains are encased in dermatocranium
a. true
b. false
Answer: b. false
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When systematists compare vertebrates to all other animals, the absence of a vertebral column is the ____ character
state and the presence of a vertebral column is the ____.
a. homologous; homoplasy b. ancestral; homology c. homologous; derived d. derived; ancestral e. ancestral; derived
What are micronutrients?
a. essential elements that are difficult to obtain b. essential elements that are able to diffuse into the cell c. essential elements plants need in small quantities d. essential elements that are visible via microscopy
Which of the following mineralocorticoid is responsible for regulating blood volume and pressure?
A. T4 B. T3 C. calcitonin D. aldosterone E. cortisol
Hormones produced by the testes control the expression of traits for
A. hair color and eye color B. beard development and number of fingers C. hair color and voice quality D. voice quality and beard development