Which of the following is an intracellular factor that affects gene expression?

A.
Chemical signals from other cells

B.
Whether a cell’s DNA is damaged

C.
Nutrient levels

D.
Mechanical signals from the extracellular matrix

The table below shows the number of foot bones in some horse fossils.horse fossil recordhorse fossil number of foot bonesp 19q 17r 24s 13ancient horses had more bones in their foot then present-day horses. the present-day horse has 11 foot bones. what is the correct order of evolution of the horse starting from the youngest fossil? a. q p r s b. s r p q c. s q p r d. r p q s

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. chinchilla x albino a) all chinchilla b) 1/2 chinchilla, 1/2 albino c) 3/4 chinchilla, 1/4 albino

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine