Greenhouse gasses<span> trap heat, or energy, and keep it in the Earth system so that the Earth and atmosphere become warmer. </span>Greenhouse gasses<span> absorb what </span>scientists call<span> infrared radiation. ... The main </span>greenhouse gasses<span> we know about in our atmosphere include carbon dioxide, water vapor, methane, nitrous oxide, and ozone. So its B</span>
Answer:
Dropping in energy levels
Against their concentration gradient
Explanation:
The pair of electrons are passed down a series of electron carriers of progressively lower energy levels through a series of redox reactions in the electron transport chain, releasing energy (electrical potential energy) to be used by H+ pump for the active transport of H+ ions (aka protons) from a region of higher concentration to a region of lower energy level against its concentration gradient.
A construction worker uses a hammer to drive a sharp nail into a concrete wall. What two simple machines is the construction worker using when he does this task-(D) a wedge and a lever
Explanation:
Simple machines are the tools an individual uses in his day to day life in order to make its work simpler.
For Example: Axles and wheel make it simple to carry a heavy object in a shopping cart.
<u>A hammer is a type of lever,</u>and is also a type of simple machines.A hammer can be defined as a heavy rigid bar moves around a fixed point ,that point is called fulcrum .
Wedges is also a form of simple machine and the inclined plane forms its foundation. A wedge can be referred to as the sharp edge of an inclined plane.They are used to level out a structure of an object
Thus we can say that A construction worker uses a hammer to drive a sharp nail into a concrete wall. What two simple machines is the construction worker using when he does this task-(D) a wedge and a lever
2.1 a) nectar b) to produce seeds c) pollen is made in the ovary
Epiglottis
The epiglottis is a flap of cartilage the covers the entrance to the throat protecting the lungs from obstruction. It moves when we swallow to allow food in.
