Phloem is the first xylem the second
Answer:
Option A, Acquisition
Explanation:
The first stage of learning is known as acquisition. It causes establishment of responses by pairing of Neutral stimulus, conditioning and un-conditioning stimulus. Once the association between a neutral stimulus and conditioned stimulus is established, the responses are acquired.
For example – If a bird is trained to pick a key whenever there is a sound of a bell, then after certain period of time an association will be established between the “ringing of bell” and “picking up of key” activity. Therefore, whenever the bird will hear the ringing sound it will search for key to be picked.
Thus, option A is correct.
Answer:
Number 2 I believe would be correct. have a nice day
Conditions are being used to try and isolate solid hydrogen cooled to low sufficient temperatures, hydrogen can grow to be strong at high sufficient pressures, and while the detail solidifies, it turns into steel.
At exceedingly low pressures, Hydrogen is compressed stable hydrogen turned into obvious. as the compression intensified, it began to show opaque and black. but at 495 Gpa, the hydrogen becomes shiny and reflective, indicating its transformation into a metallic despite the fact that the researchers cannot make sure whether or not it becomes solid or liquid).
Hydrogen can also be stored on the surfaces of solids (via adsorption) or inside solids. In adsorption, hydrogen is attached to the surface of cloth both as hydrogen molecules or as hydrogen atoms.
Learn more about hydrogen here:-brainly.com/question/19813237
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