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Oksi-84 [34.3K]
3 years ago
11

What are you looking for in your observations when you are looking for evidence of a reaction?

Biology
2 answers:
baherus [9]3 years ago
8 0

Explanation:

As we are not able see the exchange of atoms that takes place during a chemical reaction, we look for physical changes that takes place at that time. A change in color and temperature, formation of a precipitate and emission of light and gas are some of the visible changes that assures that a reaction has taken place.

Pani-rosa [81]3 years ago
7 0
A change in the contolled veriable. Such as a color change, state of matter change, a reaction like oader, bubbling or tempature change.
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A 10-year-old boy presents after noticing red streaks in his stool that began yesterday. He also complains of crampy periumbilic
kherson [118]

Answer:

Henoch-Schönlein purpura.

Explanation:

Henoch-Schönlein purpura may be defined as the medical condition of the inflammation of the IgA antibodies in the blood vessels. This condition causes purpuric rash.

This disease mainly occurs on the lower extremities of the body and can show reddish purple patches. This might also cause vasculature and leads to the cramping in the abdominal area of the body.  The stool guaiac test is positive in this condition.

Thus, the correct answer is option (C).

3 0
3 years ago
The female reproductive system enables a woman to: produce eggs (ova), protect and nourish the fertilized egg until it is fully
iren2701 [21]
A. True

Hope this helps, good luck!
5 0
3 years ago
Which relationship is shown in the graph?
podryga [215]
The answer is D as there are fluctuations which means that changes in the population of one affects the population of the other. as prey pop increases predator pop increases leading to a decease in prey pop which causes predator pop to decrease due to lack of food then prey increases and the cycle repeats
7 0
4 years ago
Read 2 more answers
Imagine you have been asked to teach a small group of your peers about animal organs. Create 10 multiple-choice questions to tes
Vinvika [58]

Answer:

Explanation:

Question 1: The brain is an example of

a) asymmetrical

b) radical symmetry

c) bilateral symmetry

d) vertical symmetrical

Question 2: Which of this organisms display radial symmetry as adults, but their larval stages exhibit bilateral symmetry

a) Dog

b) Starfish

c) Caterpillar

d) crab

Question 3: which statement defines the nervous system. Pick one

1) Nervous tissue make up the lungs, stomach and throat

2) Nervous tissue is one of four major classes of tissues and makes up the central nervous system and the peripheral nervous system

Question 4: Which of the following tissue types consists of cells that generally have a spacious intercellular area consisting of a matrix of various types?

a) connective

b) epithelial

c) muscle

Question 5: Which of the following connective tissue cells consists of a matrix of gelatinous material?

a) cartilage

b) lymph

c) areolar, adipose, reticular, dense

Question 6: Muscle tissue functions as a single unit, and is often connected to the same nerve bundles.

a) True

b) false

Question 7: Epithelial tissue are large sheets of cells covering

a) all surfaces of the body exposed to the outside world and lining the outside of organs

b) the nervous system

c) the blood vessels

d) the brain

Question 8: Which of the following is the epithelial tissue that lines the interior of blood vessels?

a) columnar

b) pseudostratified

c) simple squamous

d) transitional

Question 9: Which of the following is not a part of peripheral nervous system?

a) Cranial nerve

b) Ganglion

c) Spinal nerve

d) Spinal cord

Question 10:  Peripheral nervous system consists of the brain and spinal cord.

a) True

b) False

6 0
4 years ago
Which action best demonstrates the transformation of mechanical energy to heat energy? A(Digesting a meal.) B(burning a candle.)
sveta [45]

Answer: I believe the answer is C(rubbing hands vigorously) .

Explanation:

C(rubbing hands vigorously)  as it is mechanical when rubbing but when rubbed  vigorously it becomes heat energy.

Follow Me me Plaese and make this the brainish answer

7 0
3 years ago
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