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Kay [80]
2 years ago
7

When is it more appropriate to use presumptive tests in a crime investigation? When is it more appropriate to use confirmatory t

ests in a crime investigation? Why is hemoglobin important for presumptive tests for the presence of blood?Describe how the Kastle-Meyer test is used to detect blood at a crime scene.
Biology
1 answer:
k0ka [10]2 years ago
7 0

Answer:Phenolphthalein is a presumptive test that reacts with the heme molecule present in blood. A positive reaction gives a pink color. While bloodstains normally appear red-brown in color, the color of the substrate or the age of a stain may affect the appearance or visibility of the stain.

Explanation:

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In the DESERT BIOME, which of the following could be an example of commensalism?
amid [387]

The answer is; A gopher snake occupies a burrow made by the desert rat

Commensalism involves a relationship between two organisms where one benefits while the other is unaffected. In this case, the gopher snake gets from the burrow made by the desert sake.   The desert rat is unaffected (does not benefit or lose) by this action by the snake.

8 0
3 years ago
What is the primary function of the juxtaglomerular complex?
Vsevolod [243]

Answer:

Juxtaglomenular is a structure in the kidney which regulates the function of each nephron, the functional units of the kidney. The main function of the  juxtaglomerular cells is to secrete renin in response to:

Stimulation of the beta-1 adrenergic receptor

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Decrease in NaCl concentration at the macula densa, often due to a decrease in glomerular filtration rate

Explanation:

The juxtaglomerular apparatus is a specialized structure formed by the distal convoluted tubule and the glomerular afferent arteriole. It is located near the vascular pole of the glomerulus and a structure in the kidney that regulates the function of each nephron, the functional units of the kidney.

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3 years ago
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Relationship between algae and fish<br><br>please help me..<br><br>thanks​
dangina [55]

Answer:

Explanation:

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How does pneumonia disrupt homeostasis?
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3 years ago
Explain why is important for hydrogen bonds to be weak bonds instead of very strong bonds.
lesantik [10]

Hydrogen bonds are classified as weak because they are formed fast, but they also break easily under normal biological conditions.


Weak bonds can be easily broken, but this is extremely important because they are in bold in biological systems. For example, they help to decide and stabilize the shapes of water molecules.

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3 years ago
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