Which of the following events occurred during the first trimester?
a. heart beat begins
b. lungs fully develop
c. bones become solid
d. fetus moves and kicks and swallows

Charles darwin published his theory of evolution in 1859. in what way foes modern evolutionary theory differ from the theory as proposed by darwin? a) darwin inferred that individuals can evolve, but modern generic science has shown that this is not true. b)darwin inferred that individuals do not evolve, but modern genetic science has shown that this is not true. c)modern science has disproved most of darwin's original theory of evolution, because darwin knew nothing about generations and their role in heredity. d)generic studies have shown that gene expression and other factors operate along with natural selection, but most of darwin's theory has been supported by modern science.

Are salt and soap nutrients or toxins for yeast? explain.

Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?