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

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi