For the ten days following ovulation in a non-pregnant menstrual cycle, the main source of progesterone is the _____
A) adrenal cortex
B) anterior pituitary
C) corpus luteum
D) developing follicle
E) placenta
Answer: C
Biology & Microbiology
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A molecule of RNA has 99 phosphodiester bonds connecting ________ ribonucleotides.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
Represented by only two living genera, Psilotum and Tmesipteris, these plants resemble the extinct
Cooksonia. Having no true roots or leaves, these seedless vascular plants are essentially forking green stems.
a. mosses b. whisk ferns c. ferns d. club mosses e. horsetails
Biology & Microbiology
Select the two main types of connective tissues that make up the skeletal system.
Biology & Microbiology
In transmission electron microscopy, the specimen is placed on a
a) copper mesh grid. b) glass slide. c) plastic slide. d) magnesium mesh grid.
Biology & Microbiology