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Katen [24]
3 years ago
6

The symbol below represents a __________ __________ in a circuit. What TWO words complete the sentence?

Biology
1 answer:
allsm [11]3 years ago
6 0

Answer:

Variable resistance

Explanation:

Variable resistance on a circuit is a transistor which helps to manage the flow of current. It has many different resistances which controls the flow of current. It is used to control the voltage for different devices. The variable resistance in a circuit is represented by Rheostat.  

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Oxygen is attached to _______.
user100 [1]

Answer: The answer is C. An iron atom located on the heme portion hemoglobin

Explanation: Hemoglobin is responsible for the transportation of oxygen in the red blood cells to tissues of vertebrates. It is the protein molecule found in the red blood cells.

Hemoglobin is made up of 4 heme molecules surrounding the globin group, forming a tetrahedral structure. The heme molecules contain one atom of iron each and this is the binding spot for each molecule of oxygen through a covalent bond. Therefore, each hemoglobin molecule can have up to four molecules of oxygen attached to them.

3 0
4 years ago
Which periods are older than the Triassic period? Select 3 options.
8_murik_8 [283]

The correct answer is A, D, E.

A. Cambrian.

D. Permian.

E. Silurian.

Triassic period was termed as the period for the mesozoic era. This time period followed  extinction of great mass which founded at the end of period of permian.

It is during the period of triassic when first mammal and dinosaur appeared.

During late permian, plants like horsetails and mosses were extinct.

Those plants which evolved in on the of triassic were cydophytes and confers.

4 0
3 years ago
Read 2 more answers
3.Commercial development in the U.S. has resulted in an increase in the number of roads, housing developments, shopping centers,
Art [367]

The correct answer is option A, that is, development often causes habitat fragmentation, which can threaten biodiversity.

Fragmentation is usually illustrated as a reduction in some of all the kinds of natural habitats in a landscape, and the differentiation of a landscape into smaller and more isolated segments. With the development of the fragmentation process, the ecological influences will modify.  

Fragmentation can be a result of natural procedures like floods, fires, and volcanic activity, but it is more generally caused due to human activities like an increase in the number of roads, housing developments, shopping centers, and parking lots.  

With the enhancement in human activities, the effect of fragmentation become more. Eventually, it results in the devastating influences on the local species, a complete modification to the landscape, and the loss of the region's wilderness heritage.  


3 0
3 years ago
PLSSS HELP IF YOU TURLY KNOW THISS
Lesechka [4]

Answer: C

Explanation: Ursidae is a family of mammals in the order Carnivora, which includes the giant panda, brown bear, and polar bear

4 0
2 years ago
Is MRSA a eukaryotic or prokaryotic structure?
Sergeeva-Olga [200]

MRSA is a prokaryotic structure

6 0
3 years ago
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