I believe the answer is 20 feet. According to McBurney and Collings, the average threshold of human hearing is the tick of a watch from 20 feet in very quiet condition.
The human hearing range is a description of the pitches and loudness levels a person can hear before feeling discomfort. There is a variety of sounds in our environment, ranging from faint sounds like birdsong and rustling leaves to louder sounds like music, yelling, and industrial noise.
D. Producers provide primary consumers with the chemical energy
they need
Answer:
Males defend a large harem of females and will fight with other males to maintain dominance and access to their harem.
Explanation:
In walruses, the male will fight with other males in order to defend its dominance and access to harem. Harem refers to a group of few males and large number of females and their offspring. The male fight with each other in order to mate with the females of the group. The male who wins the fight will be the leader of the group and has the authority to defend his group from predators and mate with the females.
Photosynthesis is the process used by plants, algae and certain bacteria to harness energy from sunlight into chemical energy. <span>
Cellular Respiration - </span>a biological process in which cells convert sugar, amino acids and fatty acids into energy utilized by the cell.<span> The process plays an essential role in maintaining the biological functions of all living cells.</span>
