Answer:
A volcano that has erupted in the last 100 years called an "Active Volcano".
Explanation:
A volcano is a mountain that forms when the magma reached the surface to the earth. Magma reaches the surface because it is less dense than the solid rock around it.
An Active volcano erupts on a regular basis or it can erupt at any time and the results were devastated. examples of an Active volcano is mount Katmai in Alaska.
Answer:
The elevating levels of carbon dioxide most probably can diminish the productivity on the land and the sea. In case, when there is an elevating level of carbon dioxide in the atmosphere, more amount of carbon dioxide gets dissolved within the water bodies like sea. This further enhances the levels of pH, which leads to coral bleaching and other deleterious things that can hamper biodiversity found in the water ecosystem.
Even on land, the phenomenon of global warming resulting due to an increase in the levels of greenhouse gases leads to change in climate. Due to change in climate, a decline can be witnessed in the diversity of crops, and thus also diminishes productivity, which hampers farmers that depends on productivity as the source of income.
a. the hominids.
b. Homo erectus.
c. the paleolithic era
d. the neolithic era.
e. the first Homo sapiens.
Answer: testes
Explanation:
The testes are the male gametes which are present inside the pouch called as scrotum. The testes perform two functions that is they produce sperms and male sex hormone testosterone. The hormone testosterone is secreted by the cells of the seminiferous tubules also called as Leydig cells. The testosterone in males start producing during puberty. It is responsible for the development of secondary sexual characteristics in males like growth of facial, axial, chest and pubic hair, deepening of voice and growth of the muscles.