There are two species of sparrows that appear very similar to each other. a scientist tried to mate them. he observed that in spite of being of the same species, they didn’t interbreed. what evolutionary force must have worked in this example? migration /geographical isolation /reproductive isolation

Which hotel do you think is most likely to move ahead in market competition? a. a hotel that provides basic amenitiesb. a hotel that provides luxurious amenitiesc. a hotel that shows understanding of customers' latent needsd. a hotel that gives discounts

What would happen if the krill were removed from the food web

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables