Question 10 of 15
A multicellular organism develops from a zygote that undergoes both cell
di...
Question 10 of 15
A multicellular organism develops from a zygote that undergoes both cell
division and differentiation as it grows into an adult. What explains the fact
that cells are able to differentiate into adult cells with different structures and
functions even though they all have the same DNA?
A. The cell nucleus controls the expression of genes based on a pre-
determined sequence.
B. Cells randomly express different genes during development.
C. Chromosomes are keyed to be expressed only in some cells but
not in others.
D. External and internal cues trigger different genes to turn on and off
in different cells.
I think it’s D but I’m not sure
Answers: 1
Chemistry, 22.06.2019 12:00, sophiaa23
Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.
Answers: 2
Chemistry, 23.06.2019 10:30, thompsonjodi9638
Chemical bonds result from the interaction of the from two or more atoms. a. protons b. electrons c. neutrons d. nuclei
Answers: 2
English, 02.02.2021 14:00
Mathematics, 02.02.2021 14:00
Mathematics, 02.02.2021 14:00
Physics, 02.02.2021 14:00
Mathematics, 02.02.2021 14:00
Spanish, 02.02.2021 14:00