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.

Which of the following statements are true chromosomes make up genes

Match the examples to the correct level of organization. 1. system level roses, snakes, puppies 2. organism level roots, stamens, leaves 3. tissue level bone, cartilage, blood 4. organ level heart, veins, arteries

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.