If we name the gene for pods with A, than the alleles are: A-dominant, a-recessive.
The possible genotypes for the smooth pods are: Aa and AA, while genotype for constricted pods is aa.
If one parent has constricted pods and the other parent is homozygous for smooth pods there are two possible combinations:
P: AA x aa
F1: Aa Aa Aa Aa all of the offspring are constricted
Another combination:
P: Aa x aa
F1: Aa Aa aa aa half of the offspring are with constricted pods and half with smooth pods.
So, the correct answers are:
• all of the offspring will have constricted pods
• 50% of the offspring will have constricted pods and 50% will have smooth pods.
Answer: A. She inherited the condition
Explanation:
EDGE 2021
Immunological memory accounts for the ancient observation that someone who had recovered from the plague could safely care for those newly diseased.
Significance of plague disease
The plague is a contagious sickness that affects both animals and people. Bacteria named Yersinia pestis causes it.
- This bacteria is prevalent in rats and their fleas around the world, including in the United States.
Sunlight and drying are both effective in killing Y. pestis.
- Even yet, when discharged into the air, the bacteria may live for up to an hour, however, this might vary depending on the environment.
- Pneumonic plague is one of several types of plague. These types may occur independently or in combination, depending on the circumstances:
- When Yersinia pestis attacks the lungs, it causes pneumonic plague. This disease can spread from person to person via the air.
Transmission can occur if a person breathes in aerosolized germs, as could occur in a bioterrorist strike.
- Pneumonic plague can also be disseminated by inhaling Y. pestis suspended in respiratory droplets from a person (or animal) infected with the disease.
- In order to become infected in this manner, you must generally come into direct and personal touch with the sick person or animal.
- If a person with bubonic or septicemic plague goes untreated, the germs can migrate to the lungs and cause pneumonic plague.
The most frequent type of plague is bubonic plague.
- This happens when an infected flea bites someone or when materials contaminated with Y. pestis enter through a skin breach.
- Patients have enlarged, sensitive lymph nodes (known as buboes), as well as fever, headache, chills, and weakness.
Hence, the correct answer is option D
Learn more about plague here,
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Answer:
Platelets would release signals to stimulate the production of more platelets
Explanation:
Positive feedback mechanism is one of the two types of feedback mechanisms (other being negative feedback mechanism) in which the products of a process stimulates more of that product to be synthesized or produced. In other words, the result of a reaction increases the secretion of more results.
In this case where the injured tissue of a cut initially releases chemical signals into the bloodstream. These chemicals signal platelets to be attracted to the injured area. However, if this is a positive feedback mechanism as explained above, Platelets would release signals to stimulate the production of more platelets.
Answer:
The pH of a solution containing 0.1μΜ H+ is 7
Explanation:
The pH of any solution is given by the following mathematical equation -
![pH = -log[H_{+}]\\](https://tex.z-dn.net/?f=pH%20%3D%20-log%5BH_%7B%2B%7D%5D%5C%5C)
----------- Equation (A)
Where,
= the concentration of hydrogen ion in the solution.
Given
Substituting the given value in equation (A) , we get -
![pH = -log[10^{-7}]](https://tex.z-dn.net/?f=pH%20%3D%20-log%5B10%5E%7B-7%7D%5D)
Hence, The pH of a solution containing 0.1μΜ solution is 7
