All categories

3 years ago

Read the following scenario:

Biology

1 answer:

ahrayia [7]3 years ago

3 0

Answer:

Hair evidence is considered "class" evidence because the hair can be connected to a certain group.

Explanation:

The hair evidence alone can't be used to pinpoint John Doe in the robbery because he also came to deposit his weekly paycheck so may be the hair drop at that time in the bank. The other reason is that may be the hair has been dropped by the real thieves in order to be caught the John Doe in the crime. Hair evidence is considered "class" evidence because the hair can be connected to a certain group.

You might be interested in

The difference between PCR and real-time PCR is thatA. real-time PCR can measure the amount of DNA amplified as the reaction pro

Reika [66]

Answer:

The correct answer is <em>A. real-time PCR can measure the amount of DNA amplified as the reaction proceeds, while standard PCR cannot.</em>

Explanation:

PCR (Polymerase Chain Reaction) is a molecular biology technique. Conventional PCR and real-time PCR are diferent types of PCR, and are both used to exponentially amplify DNA molecules. In both types, a polimerase enzyme is employed to sinthesize DNA copies. The main difference is that conventional PCR is qualitative whereas real-time PCR is quantitative. So, real-time PCR permits not only to detect and amplify DNA but also permits to perform a quantification of the target DNA. This is accomplished by measuring a fluorescence signal - which is directly the amount of DNA amplified- during the course of the reaction.

4 0

3 years ago

There are 100 cats in a population that follows hardy-weinberg conditions. 4 cats display a recessive white coat color. how many

mr Goodwill [35]

We know that Hardy-Weinberg conditions include the following equations:

$p^{2}+2pq+ q^{2}=1$

where $p+q=1$

And where p = dominant, and q = recessive; this means that $p^{2}$ is equal to the homozygous dominant, $2pq$ is the heterozygous, and $q^{2}$ is the homozygous recessive .

So we have 100 total cats, with 4 having the recessive white coat color. That means we have a ratio of $\frac{4}{100}$ or 0.04. Let that equal our $q^{2}$ value.

So when we solve for q, we get:

$q^{2}=0.04$

$q=\sqrt{0.04} =0.2$

Now that we have our q value, we can use the other equation to find p:

$p+q=1$

$p+0.2=1$

$p=0.8$

So then we can solve for our heterozygous population:

$2pq=2(0.8)(0.2)=0.32$

This is the ratio of the population. So we then multiply this number by 100 to get the number of cats that are heterozygous:

$0.32*100=32cats$

So now we know that there are 32 heterozygous cats in the population.

8 0

3 years ago

Thread-like structures that are found in the nucleus of a cell that contains all DNA. *

maria [59]

Answer:

chromosomes

Explanation:

Thread-like structures that are found in the nucleus of a cell that contains all DNA. Each chromosome is made of protein and a single molecule of DNA. Human cell nucleus contains 46 chromosomes or 23 pairs. Half of these chromosomes come from one parent and half come from the other parent.

3 0

3 years ago

_______ is a unicellular infectious agent. Fungi Virus Parasite Bacteria.

Alina [70]

The answer is bacteria

6 0

3 years ago

There are varying levels of light in the ocean. Research and describe any one adaptation that helps ocean organisms to stay near

Fantom [35]

Answer:

sunlight entering the water may travel about 1,000 meters (3,280 feet) into the ocean under the right conditions, but there is rarely any significant light beyond 200 meters (656 feet). The ocean is divided into three zones based on depth and light level. The upper 200 meters (656 feet) of the ocean is called the euphotic, or "sunlight," zone.

Explanation:

hope this helps

5 0

3 years ago