How do chromosomes become visible under a light microscope as a cell prepares to divide?
A) The cell becomes flat and thin, and its internal structures become easier to see.
B) Thin strands of chromatin coil tightly and then coil again.
C) DNA is thicker after it has replicated.
D) Chromosomes become more intensely colored before cell division.
E) Chromosomes are created before cell division, and then broken down afterward.
B
You might also like to view...
Small secondary lymphoid organs, which cluster along lymphatic vessels, are termed ________
A) lymph follicles B) lymph nodes C) lymphatics D) lacteals
When a substance cannot cross the plasma membrane by itself, and instead uses a protein carrier to move from high to low concentration, it uses
A. simple diffusion. B. osmosis. C. facilitated diffusion. D. active transport.
High-quality ________ proteins are those that provide all the essential amino acids
A) fibrous B) complete C) globular D) net E) incomplete
The superior colliculi and pretectal nuclei function to direct reflexive responses to visual stimuli.
Answer the following statement true (T) or false (F)