Which tissue type produces melanin?

A. epithelial

B. connective

C. muscle

D. nervous

E. endocrine


A. epithelial

Biology & Microbiology

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The genetic material of prokaryotes is

a. RNA. b. linear. c. circular. d. single-stranded DNA. e. protected within a double-membrane structure.

Biology & Microbiology

The hormone __________ is involved in a positive

feedback cycle that results in strong uterine contractions during labor. a. estrogen b. oxytocin c. cortisol d. progesterone e. prolactin

Biology & Microbiology

You have isolated a new organism which has eukaryotic cells, is multicellular, grows as hyphae, does not perform photosynthesis, and has a cell wall. This organism most likely belongs to which kingdom?

A) Protista B) Bacteria C) Fungi D) Archaea E) either Fungi or Protista

Biology & Microbiology

Compare and contrast conventional and costly signals. Which statement is incorrect?

a. Both signals elicit costs during either production (honest signal) or use (dishonest signal). b. Both signals are energetically costly to produce. c. The meaning of conventional signals is not intrinsically connected with the structure. d. Not communicating at all may provide more fitness than communicating with a costly signal.

Biology & Microbiology