All but one of the following are false regarding protists. Identify the true statement
a. All protists are single-celled organisms.
b. Protists are prokaryotic.
c. Protists have cell walls composed mainly of peptidoglycans.
d. Most protists are single-celled organisms; some are multicellular.
e. Protists do not have the ability to move on their own.
D
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Synchronous hermaphroditism is when an animal changes from one sex to another
Indicate whether the statement is true or false
Autoimmune disorders or a tumor of the thyroid can lead to
a. diabetes insipidus. b. diabetes mellitus. c. a simple goiter. d. acromegaly. e. Graves disease.
Once uterine contractions have begun, the female body releases several hormones that act in a positive feedback loop. The purpose of this feedback loop is ________.
A. to promote the development of a new follicle B. to ensure continued contractions until labor is complete C. inhibit the release of prostaglandins D. decrease the number of oxytocin receptors in the uterus
We shiver when we are cold. In this process the brain plays which homeostatic role?
a. feedback system b. sensory receptor c. integrating center d. effector e. set point