Answer: Option D.
Explanation:
Larynx is an organ located at the neck. It is also called voice box. It is use for breathing,producing sounds and protect the trachea from food passage. There is a cartilage that lies the top of the larynx called epiglottis. During swallowing, the larynx elevates and epiglottis falls on the opening of the larynx thereby preventing food from entering the trachea.
Grasshoppers are an important native component of grassland ecosystems in the U.S., playing a role in nutrient cycling and serving as a critical food supply for wildlife.
Groundwater refers to the water present underground, in the spaces and cracks in the sand, soil, and rock. It is accumulated in and moves gradually through the geologic creations of sand, soil, and rocks known as aquifers.
The groundwater supplies drinking water to about 51 percent of the total population of the United States and 99 percent of the rural population. Almost 64 percent of the groundwater is utilized for irrigation purposes, and it is also a source of recharge for rivers, lakes, and wetlands.
Hence, the correct phrases that describe groundwater are feeds rivers, used for irrigation, and provides drinking water.
Answer: A
Explanation:
"That's what evolution is all about: tiny changes in organisms of a species over a huge amount of time."
Answer: D. The succession of community is completed.
Explanation:
A succession can be define as a series of gradual changes that occur in the biotic community of the ecosystem with respect to the changes that occur in the abiotic or non-living factors with respect to time until the ecosystem attains stability.
A climax community is the community that develops in the end of the ecological succession. It is the stable community which does not require any further change to occur. With the development of the climax community the succession completes.
