Answer:
Stars do not emit sufficient light to help locate them accurately in the night sky. The revolution of Earth makes the sun and the planets move on the ecliptic with respect to the stars.
Explanation:
Rotation and revolution causes changes in star charts. When the Earth rotates, move a way from the sun and when you have rotated far enough it will be nights and you will observe stars but as the seasons changes you will see different stars because u will change to different position. The revolution of the Earth make the stars and sun move ecliptic.
Answer: C. The farmland is undergoing secondary succession, which may or may not restore the original climax community.
Explanation:
Ecological communities are highly <em>dynamic</em>- they gradually evolve. Typically their progression involves:
- colonizing species exploiting uninhabited areas (Primary succession)
- becoming a habitable and increasingly complex community
- there is increased diversity of organisms (Secondary)
The makeup of biological communities is crucial to defining Primary and Secondary succession; eventually, through changes in this makeup, a steady-state or equilibrium is reached called a <em>climax community. </em>While Primary succession starts off with the modification of a previously unoccupied area along with increasing variation; secondary succession begins after major disruption in the community such as fires, storms and flooding.
Like the abandoned farmland near Horatio’s home, secondary communities do not begin with the removal of soil and all biological life; other species, seen here in the grassland, may be more suited to the altered conditions and begin to modify the area creating a new community.
However, the process of becoming a climax community can be pretty complicated- it is very dependent on other factors like temperature and rainfall. Communities that experience rapid change, frequent major disruptions and even human intervention, are less likely to attain a stable equilibrium and may never become climax communities.
Another element that is important to bones is calcium
Answer:
World Health Organisation
Explanation:
"WHO" stands for World Health Organisation. It's an specialized agency of the U.N that is concerned with international public health.
