A control set up
it's a set up without the factor tested hence is unchanged. you compare you results to it so show that no external factors were the cause of your results and the change is purely due to the factor tested.
I wanna say AB-
only O can b used 4 any blood type
I think that the mice in the area are a dark color to keep them hidden from the owl by blending them in with their environment
Answer:
Green plants act as producers because they can generate their own food(glucose) by photosynthesis in presence of sunlight.
Explanation:
Green plants or producers are placed in the first tropic level of energy pyramid.Animals those intake green plants for energy source are called primary consumers such as grasshopper.
Animals those fed on primary consumers for nutrient source are called secondary consumers or primary carnivores for example frog that eat grasshopper for their energy source.
Animals that fed on secondary consumers for energy source are called tertiary consumers or secondary carnivores.For example snake that eats frog to gain nutrients from the later.
The muscles are composed inside mainly of fibers, filaments and proteins, where it is important to consider the <u>length-tension</u> relationship of the thick and thin filaments to know the tension.
<h3>What is muscle contraction?</h3>
It is an organized and natural event that takes place at the level of the muscles when the fibers and proteins inside them come together, and tension is produced in the area.
<h3>Characteristics of muscle contraction</h3>
- In a muscle contraction, a tension is generated that depends on the length-tension relationship, which causes a displacement of the muscle filaments.
- The proteins actin and myosin join together, and a force is generated so that the final movement is achieved.
- To know the tension, the muscle changes length and measurable external work is produced from the force and distance traveled.
Therefore, we can conclude that the contraction allows us to make movements to reach and carry our extremities to different places.
Learn more about muscle contraction here: brainly.com/question/14625676