When the sperm meets the egg during sexual reproduction, a zygote is formed. this single-cell zygote is the first step of a much more complex multi-cellular organism.

What are the characteristics of living things

According to the cladogram, which organisms have roundworms as a common ancestor?

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