Why do endotherms need to be well insulated from the external environment?
What will be an ideal response?
Endotherms maintain body temperatures that are much higher than the surrounding environment. As a result, heat tends to flow out of these animals in order to establish an equilibrium with the external environment. Having insulation slows down the process of heat loss in these animals.
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The neoteny hypothesis is supported by which of the following characteristics? Select all that apply
A. large heads B. relative hairlessness C. a foramen magnum positioned at the base of the skull D. relatively flat faces and small noses E. None of the above.
A fungal infection found mostly in the tropics and temperate regions is characterized by the development of soft, yellow or pale-brown aggregations around hair shafts in the axillary, facial, genital, and scalp regions. The fungus that would most likely be isolated is:
a. Candida. b. Malassezia. c. Cryptococcus. d. Trichosporon.
The primary significance of the 1000 Genomes Project is to
A. trace human ancestors back 1000 years. B. account for the inherent error rate of sequencing by including a greater sample size. C. identify the 1000 most important genes to human health. D. take into account the variation in human genomes across populations.
Companion cells are specialized cells found in which plant tissue?
A) meristematic tissue B) ground substance C) phloem D) xylem