A type specimen refers to:
A. The most complete specimen known for a fossil species
B. An individual specimen that comes closest to representing the average individual in a species
C. The specimen(s) used to name a species
D. The geologically oldest specimen known for a fossil species
E. All of the above
Answer: C. The specimen(s) used to name a species
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Specialized islet cells that secrete hormones
are found scattered throughout the
a. adrenal cortex. b. liver. c. thymus. d. adrenal medulla. e. pancreas.
Which of the following lack vascular tissue?
A) cone-bearing plants B) grasses C) ferns D) mosses
Which of the following is a feature of an endocrine gland?
A. the product of these glands is carried into the lumen of an organ B. secretes a hormone into a gland or duct C. they do not respond to a negative feedback system D. secretes a hormone directly into the bloodstream E. characterized by the salivary glands
If you forgot to heat fix a smear before doing a Gram stain, which of the following might occur?
A. Gram-positive and Gram-negative bacteria would both stain purple. B. The stains would not adhere to the bacteria. C. The decolorization step of the Gram stain would not work properly. D. The smear may not adhere to the slide.