Modern cell theory is best described as being based on
a) similar evidence collected in multiple experiments by different people
b) experiments conducted in the mid-1600s
c) accounts of what does and does not happen in the natural world
d) the work of robert hooke

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

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4

The polio virus can cause skeletal muscle paralysis by destroying neuron cell bodies. what area of the spinal cord is destroyed