Ciliary muscles are involved in:
A. controlling the amount of light entering the
eye.
B. tracking an image.
C. blood supply to the eye.
D. focusing an image onto the retina.
D
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A response to change in the internal/external environment that adds to the change is called
a. positive feedback. b. physiological feedback. c. reflex feedback. d. negative feedback. e. anatomical feedback.
Sea anemones and other cnidarians have
a. radial symmetry. b. a “nerve net.” c. tentacles. d. no centralized brain e. all of these.
The concept of evolution has always been connected with some notion of progress–natural selection pushing populations toward better and better adaptations to create "perfect organisms." How would you argue that evolution does not craft perfect
organisms? What will be an ideal response?
Which of the following skin infections is caused by a protozoan?
A) leishmaniasis B) dermatophytic infections C) otitis externa D) cutaneous candidiasis E) cutaneous anthrax