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maria [59]
3 years ago
10

The brain requires a substantial blood supply. the vessels that deliver blood to the brain are the

Biology
1 answer:
I am Lyosha [343]3 years ago
3 0
The common carotid arteries and the vertebral arteries
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Which curve shows the course of the reaction in the presence of an enzyme--the black curve or the red curve? Which line represen
nikklg [1K]
I found the attached image on the internet and it really helps complete this exercise.

First question:
In the presence of an enzyme, the course of the reaction is shown by the red curve. The necessary energy to make a reaction occur is less when there is an enzyme to help the reaction happen. Enzymes work as catalysts that act over substrates converting them into different molecules in a much accelerated way then it would happen without the enzyme's help, if it would happen at all.

Second question:
The activation energy is represented by line B. The activation energy is the energy needed to be available for a reaction to happen. If we compare it with line A, which represents the activation energy necessary for a reaction without an enzyme, we can see how much less energy is necessary to dispend when an enzyme is part of the reaction. Line C represents the energy resultant from the reaction.

3 0
3 years ago
______ polymers can be produced in large quantities at low cost.
lorasvet [3.4K]

Electrical products

Explanation - Polymers of electrical products can be produced in large quantities and low cost. This type of polymer are non-conductive in nature. However, they very high heat resistance property. Polymers for electrical products can mold itself in various shapes and sizes and also can reach very minute areas.

Polymers vary from one item to another. Polymers for commercial packaging is different from polymers of electrical products. Thus, polymers need to be chosen properly according to the use and its effectiveness.  

4 0
3 years ago
Sugar easily dissolves in water because of waters ...
spin [16.1K]
<span>Water has positive and negatively charged bonds. 

Sugar easily dissolves in water because of water's </span>polarity. 

I hope this helps!
8 0
3 years ago
Explain how deep water currents affect the number of organisms found in the area by circulating nutrients.
MariettaO [177]
Deep water currents affect the number of organisms found in the area by circulating nutrients due to upwelling. Upwelling is a process where cold water surfaces and encourages nutrients to the surface. When exposed to sunlight, they initiate energy which keeps the flow of the ecosystem. 
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3 years ago
Use the drop-down menus to identify the scientists who match the descriptions below. found that animals are composed of cells fo
NISA [10]

found that animals are composed of cells is Theodor Schwann

found that plants are composed of cells is Matthias Schleiden

looked at cork through a compound microscope is Robert Hooke

declared that all living cells can only come from other living cells called living cells "animalcules" is Rudolph Virchow

6 0
3 years ago
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