When something needs to be transported against its concentration gradient, or a molecule is too big to simply diffuse through a membrane, active transport has to be used. So active transport requires energy (ATP).
Examples:
1. Antiport pumps: transport one substance in one direction while transporting another substance the other way. An example of this is the sodium-potassium pump.
2. Symport pumps - uses a substance that wants to move from an area of high concentration to low concentration and carries another substance against its concentration gradient. An example of this is the sodium-glucose transport protein
3. Endocytosis - large amounts of extra cellular fluid can be taken into a cell - needs ATP to bind proteins in the cell membrane and causes them to change their shape...which eventually causes the surrounding of the fluid to be brought in (a vesicle).
4.exocytosis - opposite of above
Answer:
A. Atmosphere
Explanation:
Atmosphere would be most immediately affected by a decrease in sunlight because sunlight is responsible for the photosynthesis in plants. if sunlight decreases, the photosynthesis reaction is also decreases in plants and less carbondioxide gas is used by the plant from atmosphere for making their food so we can say that atmosphere is greatly affected by the decrease in sunlight.
So you know that there are 3,000,000 of bacteria in one gram of soil so you multiply 3,000,000×10 and you get 30,000,000. Then you just check all your options. So it's 3×10^7.
I'm sure it's true since before doing a science experiment/If you're trying to figure something out, you need a Hypothesis.
Anything that can be seen, touched, tasted, smelled or heard. it might also involve the sense of proprioception, such as the movement of the arms and legs or the change in position of the body in relation to objects in the environment .
ex - A car drives past with the window rolled down and the music blasting, Another would be , A duck splashes in a nearby pondd .
- Hope this helps
