<u>Answer</u>:
1. <em>The student could increase the number of loops of wire around the iron core. </em>Increasing the number of windings will increase the strength of the electromagnet also known as the magnetomotive force.
2. <em>The student could use a bigger battery so that the voltage is increased. </em>Thus, according to Ampere's Law, the magnetic field around the current-carrying wire will also increase as it is directly proportional to the current's strength.
<span>The actions of sleep and dreaming are influenced by the pons. This portion of the brain is located above the medula, and connects the upper and lower parts of the brain. In addition to driving sleep and dreaming, it also synthesizes signals to control movements on the two sides of the body.</span>
Essentially ingesting too much salt can cause the salt to absorb the water in your body and this can make you dehydrated and lose water you need.
Answer: The correct answer is-
C.They replaced carbon dioxide with oxygen in the atmosphere.
Cyanobacteria ( also known as blue green algae) is a large phylum of bacteria that is capable of synthesizing its own food using carbon dioxide and water in the presence of sunlight ( photosynthesis).
They contain a green pigment called chlorophyll that absorbs energy from sunlight and helps in the formation of food ( glucose). They release oxygen as a byproduct in the atmosphere.
As these organisms utilize carbon dioxide ( that is present in the atmosphere) to give oxygen in return, therefore, they affected early atmosphere of Earth by replacing carbon dioxide with oxygen.
Thus, option C) is the right answer.
It goes
Cell -> Tissue -> Organ -> Organ System -> Organism
So the answer would system level :)
