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Leni [432]
3 years ago
12

A scientist tests a sample in the lab and finds

Biology
1 answer:
ziro4ka [17]3 years ago
4 0

Answer:

It is difficult to obtain a final conclusion with this information, but it is possible that the sample doesn't contain living organisms whose genetic material is composed of DNA. Another possible reason for this result is that the DNA extraction protocol used in the experiment is not suitable for this sample.

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At what point in a lab do you think the yeast became metabolically active?
FinnZ [79.3K]
What are the choices?

7 0
3 years ago
What are the estimated allele frequencies in a population if the frequency of the dominant phenotype is 0.64 (Hint: handout to g
Nadya [2.5K]

Answer:

0.8 and 0.2

Explanation:

Hardy Weinberg law states that the allele frequency of the population remain stable from one generation to next generation if no natural selection, drift or mutation occurs in the population.

Let p and q be the dominant and recessive frequency of the population respectively.

The dominant phenotype means p² = 0.64

p = 0.8

and we known that p + q = 1, in hardy Weinberg equilibrium.

0.8 + q = 1.

q = 0.2

Thus, the dominant allele is 0.8 and recessive allele is 0.2.

6 0
3 years ago
Which is an example of a plant with true roots? <br> A) algae B) ferns C) liverworts D) moss
fredd [130]

Answer: B) ferns

Algae, liverworts and moss are examples of plants with no real stems, leaves or roots and are also known as nonvascular plants. Plants with true roots are known as vascular plants. Vascular plants have real roots, stems and leaves and contain vascular tissues. 

5 0
3 years ago
7. What is a layout of chromosomes in humans in order from largest to smallest with the
hodyreva [135]

Answer:

Look down!!! ;)

Explanation:

In a human karyotype, autosomes or “body chromosomes” (all of the non–sex chromosomes) are generally organized in approximate order of size from largest (chromosome 1) to smallest (chromosome 22). However, chromosome 21 is actually shorter than chromosome 22.

Hope this helps!! ;)

5 0
3 years ago
Providing immunity by injecting the body with a weakened form a pathogen is known as
blagie [28]

Answer:

vaccination

Explanation:

The vaccination has been one of the most revolutionary inventions in the medical field. This invention helped protect people from numerous diseases, some being totally neutralized, while some having only minor effects on the human body. The vaccination basically is a way of enhancing the immune system of the body by injecting in it a weakened form of the pathogen. In this way, the weakened form of the pathogen is not capable to harm the body, and the body is not fighting against it, but instead the pathogen becomes part of the body and its defense mechanism, so when the pathogen strikes, the body has a counter attack and defeats it.

3 0
3 years ago
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