Pepsinogen is converted to pepsin by acid.
a. true
b. false
Answer: a. true
You might also like to view...
Do you agree with geneticists that there is no genetic basis to divide humans into races? Why or why not?
What will be an ideal response?
Identical twins can result from
a. the fusion of two sets of identical gametes. b. a division of a zygote into two separate cells that develop into two separate embryos. c. the fusion of two paternal gametes with a single maternal gamete that then divides. d. a lack of chromosomal separation during meiosis resulting in gametes that are diploid and don't need to be fertilized. e. a mechanism that is not understood.
Four of the five choices listed below are parts of a
leaf. Select the exception. a. stoma b. cuticle c. mesophyll d. node e. petiole
."A change over time" is the definition of
a. mutation. b. homeostasis. c. physiology. d. evolution. e. respiration.