Q6.6. Which of the following is REQUIRED for the process of evolution by natural selection to occur?
Offspring must be similar to their parents due to shared genes,
There must be a sudden environmental change.
There must be a predator preying on the species
One or more species must have recently been introduced to the region.

Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. he used a golf ball, a tennis ball, and a soccer ball. he dropped each ball from the balcony once. diego recorded his observations after each drop. what can diego do to best improve the reliability of his results? a) drop each ball from the platform three more times b) record his observations in more than one unit c) write at least two scientific questions after the experiment is complete d) share his results with other people who have done similar experiments you for the !

As a result of climate change earths temperature is rising and sea ice is melting what is a likely effect? answer : populations of walruses and polar bears will decline

Currents are caused by temperature and density differences