Answer:
C
Explanation:
The organ that secretes triiodothyronine is:
C) Thyroid gland
Answer:
True
Explanation:
Cancer is the genetic order than can be caused by different reasons but one of the main is "MUTATION IN GENES"
Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. These contrast with benign tumors, which do not spread to other parts of the body.
Answer: True
Humans have impacted the rainforests through mining, agriculture and construction as rainforests are mainly occupied with large forests trees and vegetation. Human clear cut the forests to make the land available for the purpose of mining to derive economically valuable minerals from earth, construction of house and for agriculture. This has resulted in the extinction of large number of floral and faunal species from earth. It has decreased the percentage of forest cover on earth.
According to the question, it is true that Humans have impacted the rainforests through mining, agriculture, and construction.
How human impacted the rainforests through mining
Gemstones and Precious metals such as gold, copper, diamond are important resources that can be found in the rainforests across the world. Extracting these resources is harmful activities that contribute lot of damages to the rainforests ecosystem. It causes problem for the people that live close to the rainforests. Chemical pollution and deforestation from mining can have a great adverse effect on the rainforests environment. It also affects downstream aquatic habit.
How human impacted the rainforests through Agriculture
In the rainforests, large areas are cleared for pastoral farming because the demand of meat globally has increased the opening of cattle farms in the rainforests and this also cause deforestation which has adverse effect on the rainforests. Arable farming also contribute to the loss of tropical rainforests as many farmers are clearing the land to grow crops such as soya beans.
How human impacted the rainforests through Constructions
Road building has different of direct impacts on the rainforests. In most wet tropical rainforest, the cut and fill operation related with road construction can prevent easy flow of streams, increase flooding in the forest and can drastically increases erosion in rainforests. Construction of roads in the rainforest can discharge nutrients and chemical pollutant into water ways and create avenue of invasion for disturbing exotic species.
LEARN MORE:
KEYWORDS:
c. destroyed
b. absorbed
d. reflected
Answer:
reflected
Explanation:
Answer:
By release of methane gas
Explanation:
Most of the waste in a land fill is biodegradable which releases methane gas in the air while degrading.
Methane gas is a green house gas which is able to entrap the heat radiated back by the earth. Entrapping of heat energy causes rising of global earth temperature thereby causing global warming.
Methane is much dangerous than carbon dioxide as it entraps twenty time more heat radiated by earth.
Hence , in this way solid garbage in landfills can result in air pollution.
b. stable periods of change interrupted by rapidly occurring change.
c. species that are said to be in equilibrium.
d. a steady change in evolution over time.
The correct answer is option b. stable periods of change interrupted by rapidly occurring change.
The punctuated equilibrium is referred to a evolutionary pattern, in which the organism changes rapidly in order to survive the changing environment and remain unchanged for a very long period of time. hence, in this case, a stable period of change is followed by a rapidly changing phase.
The gradualism refers to the slow and steady changes, which helps the organism to adapt the changing environment.