Astudent used a microscope to observe a single-celled organism. as he watched ,it looked as if the organism split into two cells. he made drawings, shown below, of the organism over a short period of time.
a. genetic engineering b. asexual reproduction c. selective breeding d. gamete formation.

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a. coral reefs because of the loss of the symbiotic algae living within their bodies b. penguin populations because the fish they eat will move into warmer waters c. mountain-dwelling birds because rising sea levels will relocate their food sources d. large cats in the rainforest because of decreased habitat loss for their prey

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome

Northern switzerland has a fairly cold climate caused by sea winds from the atlantic ocean but souther switzerland tends to be much warmer and sunnier, what could cause this difference?