Solution:
The ecosystem boundary of a drainage basin can be defined by the mountains, hills and valleys that determine where the water flows.
Since the Ecosystem is define as all the organisms and their physical and chemical environment within a specific area where energy and matter influence the distribution and abundance of organisms present.
Thus the right answer is mountains, hills and valleys that determine where the water flows.
Bottleneck is the term used to define chance changes in the frequency of alleles which have a significant effect on small populations. The effect is that the population is greatly reduced because of the change in the allele frequency. A genetic drift will follow which will expedite evolution.
A. Average weather conditions over extended periods of time
Answer:
False
Explanation:
I heard of that sheep before I leard about this in like 6th or fith answer is false
Two years later, researchers in Japan cloned eight calves from a single cow, but only four survived. Besides cattle and sheep, other mammals that have been cloned from somatic cells include: cat, deer, dog, horse, mule, ox, rabbit and rat
Answer:
Environmental exposure to certain chemicals, ultraviolet radiation, or other external factors can also cause DNA to change. These external agents of genetic change are called mutagens.
