The central axis around which the shell of a snail coils is called the

a. Aperture
b. Columella
c. Sinistral
d. Dextral
e. Torsion


Answer: b. Columella

Biology & Microbiology

You might also like to view...

The sum total of all chemical reactions occurring in a cell is called

A. metabolism. B. catabolism. C. anabolism. D. None of the choices are correct.

Biology & Microbiology

Which of the following is routinely used to detect spirochetes in skin lesions in early syphilis?

A. Phase-contrast microscopy B. Dark-field microscopy C. DNA fingerprinting D. Bright-field microscopy

Biology & Microbiology

AIDS is short for

a. Acquired Immune Deficiency Syndrome. b. Accelerated Immune Death Syndrome. c. Accentuated Induced Deficiency Syndrome. d. Advantageous Immunity Deficiency Syndrome. e. none of these.

Biology & Microbiology

Steroid hormones ________

A) begin their action outside the membrane B) usually diffuse through the plasma membrane into target cells C) bind to receptors in the plasma membrane D) are water soluble

Biology & Microbiology