The correct answer is: a tourniquet.
The tourniquets are tight straps around an arm or leg and tightened to stop bleeding, used to control arterial and venous blood flow. In the past, tourniquet are used to control bleeding during amputations. Now, a tourniquet is used in surgeries to block arterial blood flow following and to minimize blood loss.
Lobe-finned fishes are characterized by lobes in their fins in addition to the basic characteristics of fishes.
<h3>What are lobe-finned fishes?</h3>
Lobe-finned fishes are a group of fish known as Sarcopterygii. They possess the basic characteristics of fishes such as swim bladder, lateral lines, etc.
They are a sister group of ray-finned fishes. In addition, lobe-finned fishes possess the following characteristics:
More on lobe-finned fishes can be found here: brainly.com/question/7849168
#SPJ12
The electrons in the outermost shell of the covalent compounds are shared by nearby atoms. As there are no free electrons for conducting electricity, the covalent compounds are perfect insulators at absolute zero. As the temperature increases, some electrons move from valence band to conduction band. This gives rise to conductivity. But as the numbers of charge carriers are very low, covalent compounds are poor conductors. On the other hand metals are good conductors cause of their bonding. Metallic bonding consists of a sea of electrons rather than discreet bonds. The free electrons are able to move freely. Since electricity and heat need electrons to move, the bonding promotes conductivity.
According to science, D would be the correct answer. Hope this helps!
Answer:
Plant as a biotic component needs sunlight an abiotic component to photosynthesize
