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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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The cytoplasm divides during this segment of mitosis _____.
-BARSIC- [3]

Answer:

<em>The correct option is D) cytokinesis</em>

Explanation:

Mitosis can be described as a process in a cell replicates to form two identical copies of itself.

Cytokinesis can be described as the last stage of cell division for both prokaryotes and eukaryotes. During this stage, the cytoplasm eventually divides and the cell splits into two with equal portions of cytoplasm in each side. Although the mechanism of cytokinesis is different for both plants and animals yet it is the final stage for both the cell type in which the cytoplasm splits.

7 0
2 years ago
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Describe what happens when a weak acid dissolves in water
harina [27]
Weak acids do not and cannot dissolve in water. They become even more diluted, or watered-down, and become even weaker acids.
5 0
3 years ago
Which offspring will be homozyguous dominant?
sukhopar [10]
Homozygous dominant is when 2 dominant alleles are present. Solve the punnett square and whichever boxes have 2 dominant (uppercase/capitalized) letters in it are homozygous dominant

I cannot read the letters on your picture very well, I'm sorry.
7 0
2 years ago
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When a person is dehydrated, his or her iv fluids?
Lapatulllka [165]

When an individual is dehydrated, his or her intravenous fluids should be isotonic, because either a hypertonic or hypotonic IV would both cause damage to the individual’s red blood cells. Isotonic solutions are used: to increase the EXTRACELLULAR fluid volume because of blood loss, surgery, dehydration, fluid loss that has been loss extracellularly.

8 0
3 years ago
The ____ phylum of seedless vascular plants has about 1000 known living species, including those in the genera
dalvyx [7]

Answer:

D)Lycophyta

Explanation:

The seedless vascular plants or the pteridophyte forms one phylum of the plant kingdom.  The pteridophyte kingdom can be classified into three groups: the Sphenophytes, the pteridophytes and the Lycophytes.

The Lycophyte group contains about 1000 living species as it is the most primitive group of vascular plants. The species is characterised by the presence of the microphyll like the Selaginella and Lycopodium.

The rhizoids of the gametophyte of these plants form the mycorrhizal association with the fungi.

Thus, Option-D is the correct answer.

3 0
3 years ago
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