Purple flowers are dominant, white flowers are recessive. We are using the letter 'Na' for the flower color gene. What are all the possible allele combinations for a purple flower?
-АА
-Аа
-аа

If scientists are wrong about earth's age based on radioactive material and the decay rates are really much faster, how would nuclear power plants be affected?

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?