Almost all chromosomally abnormal embryos and fetuses are ____________________ as pregnancy progressesFill in the blank(s) with the appropriate word(s)

The secretion of excess water via a contractile vesicle of a Paramecium cell is an example of

A) active transport. B) osmosis. C) simple diffusion. D) exocytosis. E) facilitated diffusion.

Referring to the above diagram, what structure

is labeled "D"?

a. the appendix b. the cecum c. a polyp d. a portion of the small intestine e. the colon

One of the reasons that most animal cells will not burst if too much water enters by osmosis is that

a. the cell wall will protect it. b. most body cells selectively move solutes out. c. carrier proteins will remove excess water. d. solute molecules will resist water molecules. e. salts will absorb the water.

Based on cladistics, which eukaryotic kingdom is polyphyletic and, therefore, unacceptable?

A) Plantae B) Fungi C) Animalia D) Protista