Answer: The Tigris-Euphrates river system, where Mesopotamia started, was an area prone to frequent flooding. The flooding deposited valuable silt onto the land and enabled crops to be grown and harvested in surplus. This was the first time farmers had an excess of what they needed. The surrounding land was devoid of most other raw materials, such as wood, stone and metal. To get these materials, the early Mesopotamians resorted to trade. At these gathering hubs, people began constructing buildings, which formed the basis for the first cities to appear and helped civilizations continue to develop.
B. primary consumer → producer → decomposer → secondary consumer
C. producer → secondary consumer → decomposer → primary consumer
D. producer → primary consumer → secondary consumer → decomposer
The Food web is a complex interaction between autotrophs and heterotrophs and how the energy flows through them.
Thus, the energy flow in a food chain starts from producers to consumers and is then degraded by decomposers.
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Answer: it has to be D
Explanation:
the producers eats plants and the primary consumers feeds on the producers. the secondary consumers feeds on the primary consumers while the decomposer eats the dead
Both systems regulate blood flow throughout the body.
Both systems help remove carbon dioxide from the body.
Both systems send messages to the nervous system for breathing.
The respiratory and circulatory systems are similar Both systems help remove carbon dioxide from the body. Thus, option "C" is correct.
The respiratory system Circulates oxygen into the body and blood needs oxygen the circulatory system circulates all the blood in your body in the works together with the respiratory system.
Thus, option "C" is correct.
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Answer:
Both systems help remove carbon dioxide from the body.
Explanation:
I just took the test
bones?
OA. Nitrogen
OB. Hydrogen
OC. Calcium
OD. Barium
Answer:
Calcium
Explanation:
B. stratosphere
C.troposphere
D. mesosphere
Answer: The first person is wrong
Explanation: its A. exosphere
Aerobic respiration.
Aerobic respiration occurs in the mitochondrial cell and needs oxygen and glucose, for production of carbon dioxide and water,energy. The chemical reaction takes place as below:
C6H12O6 + 6O2 → 6CO2 + 6H2O +energy .
In this reaction when glucose react with oxygen and produce carbon dioxide and water and energy released
Nerve and muscle are the cells that no longer undergo mitosis.
A cell must go through either mitosis or meiosis in order to divide. Since neurons are somatic cells, they must go through mitosis. Centrioles must travel to the poles and generate spindle fibers that pull the chromosomes in order for mitosis to take place.
Neurons cannot undergo mitosis because they lack centrioles, which prevents them from dividing.
In our nervous system, each nerve cell has a unique location. Its sole responsibility is to transmit a signal from one place to another. In a particularly complicated system, adding more nerve cells might disrupt these extremely precise connections.
Therefore, Nerve and muscle are the cells that no longer undergo mitosis.
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