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Kay [80]
3 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]3 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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How does genetic variation affect the type of traits or the adaptations in the individuals of a species?
Gnesinka [82]
Genetic variation describes the genetic differences among individuals of the same species that are naturally occurring.  <span>Each genotype within a population usually has different degrees of fitness to an environment. Mating between same species with favored genes guarantees survival of the population in their chosen environment. As the environment changes, the mating behavior between species may again change resulting to a different gene pool to guarantee survival. </span>
7 0
3 years ago
You cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered snapdragon. all of the f1 are pink. what c
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Red and white show incomplete dominance

Incomplete dominance is a form of intermediate inheritance in which one allele for a specific trait is not completely expressed over its paired allele. This results in a third phenotype in which the expressed physical trait is a combination of the phenotypes of both alleles.

Hope this helps! I'm happy to help with any other questions you might have :)

8 0
3 years ago
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Which representation of data visualizes potential relationships between variables?(1 point) a table a graph a chart a list
Georgia [21]

Answer:

A chart

Explanation:

A database management system (DBMS) can be defined as a collection of software applications that typically enables computer users to create, store, modify, retrieve and manage data or informations in a database. Generally, it allows computer users to efficiently retrieve and manage their data with an appropriate level of security.

A chart is a representation of data which visualizes potential relationships between variables. Some examples include pie chart, bar chart, etc.

A bar graph also known as a bar chart can be defined as the graphical representation of data (informations) by using vertical columns or rectangular bars. When a data set is observed, a bar chart can be used to graphically represent or record the total or overall amount of information contained therein. Generally, bar charts are used for the comparison of informations obtained from a data collection by representing each value (information) with rectangular bars respectively.

7 0
3 years ago
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The mass of Venus is 4.87 × 1024 kilograms, and the mass of Jupiter is 1,898 × 1024 kilograms. The mass of Jupiter is about ____
solong [7]
11.8 times the mass of venus
4 0
3 years ago
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A sample of a woman's blood is analyzed for reproductive hormone levels. The results indicate a high level of progesterone, rela
EleoNora [17]

Answer:

Answer is C, the secretory phase.

Explanation:

At this phase, the progesterone is the dominant hormone, and it prepares the corpus luteum and endometrium for possible fertilized ovum implantation.

This phase is also known as Luteal.

5 0
4 years ago
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