In the ovule, which two cells (with a total of three nuclei) are fertilized?
What will be an ideal response?
the two nuclei in the primary endosperm cell and the egg cell
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Which of the following is true?
a) The aqueous layer of the tear film is the thickest layer. b) The lipid layer of the tear film is produced by the conjunctival goblet cells. c) The mucin layer is secreted by the glands of Wolfring. d) There are 4 layers of the tear film.
Which of the following statements about the filtration barrier of the glomerulus is false?
A. The endothelial cells of the capillaries have foot-like processes that interlock with the surrounding podocytes. B. The filtration barrier is made up of three layers. C. The capillaries in the kidney are more permeable than capillaries elsewhere in the body. D. The filter allows the passage of small molecules, but blocks the passage of cells and proteins. E. None of these statements about the filtration barrier of the glomerulus is false.
After a seed germinates, nutrients stored in endosperm (in monocots) or in ____ (in eudicots) support the seedling's growth
a. radicle b. hypocotyl c. cotyledons d. plumule e. seed coat
Affixing antigen to an inert particle such as a latex bead is sometimes used in which type of test?
A.) cross-reactions B.) agglutination C.) precipitation D.) specificity E.) sensitivity