All categories

3 years ago

Which culprit originates an allergic response and causes Juan to sneeze when he sniffs the morning glory flower?

Biology

2 answers:

olya-2409 [2.1K]3 years ago

5 0

D) harmless plant proteins

nydimaria [60]3 years ago

3 0

Answer: D) harmless plant proteins

Pollen is a male gamete, which is produced by the flowers in order to conduct fertilization of female gamete or ovule. The pollen contains proteins which acts as an antigen. When these proteins or antigens are inhaled by the living organisms like humans it creates an allergic response in them. This occurs due to the fact that, when body receives a foreign antigen, the body immune system gets activated and it produces antibodies against it, to expel it out of the body by sneezing.

According to the above information, the culprit is affected by harmless plant proteins, which will originate an allergic response, causing Juan to sneeze when he sniffs the morning glory flower.

You might be interested in

Los métodos hormonales son eficientes porque: * A: impiden la entrada de los espermatozoides C: Se inhibe (no se desarrolla) la

timofeeve [1]

Answer: C: Se inhibe (no se desarrolla) la ovulación.

Explanation:

Los métodos anticonceptivos se utilizan prevenir el embarazo no deseado, evitando que el esperma fertilice a un óvulo. Hay distintos tipos, los cuales se clasifican en:

Anticonceptivos hormonales: Contienen hormonas, tales como estrógeno y progesterona, que previenen la ovulación (es decir, la liberación de óvulos de los ovarios). De esta manera, al no haber óvulo disponible, por mas que hayan espermatozoides, no va a ocurrir ninguna fecundación. El método mas conocido es la píldora o pastilla anticonceptiva.
Anticonceptivos de barrera: Proveen una barrera física que impide la fecundación al impedir el encuentro entre el óvulo y el espermatozoide. Por ejemplo, el uso de preservativos o condones. En estos métodos, se impide la entrada de los espermatozoides, no se encuentran con el óvulo y la esperma queda atrapada dentro del condón.
Anticonceptivos permanentes: Proveen un método permanente como por ejemplo el Dispositivo Intrauterino que se coloca en el tracto uterino con una vida media de meses o años y posee un efecto espermicida que mata a los espermatozoides (por lo que no lograrán encontrar un óvulo). Otro ejemplo es la vasectomía, la cual es una cirugía que corta los conductos deferentes que transportan a los espermatozoides por lo que ya no pueden salir de los testículos para producir la fecundación (quedan atrapados dentro de los testículos, no entran al tracto uterino y no encuentran al óvulo)

Tanto los métodos de barrera como los permanentes, no inhiben la ovulación aunque si impiden que el óvulo se encuentre con el espermatozoide. Entonces, los métodos hormonales son los únicos que logran inhibir la ovulación. Las píldoras que poseen las hormonas previamente mencionadas pero fabricadas sintéticamente. Las mismas mimetizan el efecto de las hormonas naturales producidas por el cuerpo, alterando el ciclo menstrual regular y así evitan el embarazo ya que no habrá óvulo disponible para fecundar. Además, también pueden alterarla mucosidad en el cuello del útero para que los espermatozoides no pueden atravesarlo y llegar al óvulo. De todas maneras, el objetivo principal y mas importante de los métodos hormonales es bloquear la ovulación.

6 0

3 years ago

A Punnett square is used to predict the outcome of a genetic cross, however, does every actual cross result in the outcome predi

Kitty [74]

Answer:

Yes this is true. The Punnett square can be used for such purposes

Explanation:

5 0

3 years ago

In a fish species, the number of eggs that hatch and survive for one year varies depending on the number of eggs that were produ

Alenkinab [10]

Answer:

C. The chance of survival decreases when there is intraspecific competition for resources among surviving yearlings

Explanation:

The survival rate of the offspring of the fish species will decrease as a result of the huge number of eggs produced giving rise to overpopulation. Pressure will be on the limited available resources. As a result of this, Intraspecific competition would occur as members of the same fish species would compete for the limited resources.

Interference and exploitation competition are two types of Intraspecific competition that can reduce the population size of the fish species.

For Interference competition, the dominant and stronger members would secure adequate supply of the limited resources to detriment of the weaker and less dominant ones. This leads to the death of those members that are weak to compete successfully, thereby leading to a reduction in population size.

In exploitation competition, it involves all individual members of the fish species sharing the limited resources equally, while none of them gets an adequate amount. With time, a great size of the population decrease would be noticed when compared to that of Interference competition.

8 0

3 years ago

What does this photograph, which is representative of most of mercury, indicate about the planet?

VLD [36.1K]

Mmmmmm mercury sexiest planet thanks for the pic

5 0

3 years ago

Which of the following ideas is supported by Darwin's observation of local variation among tortoises in the Galapagos Islands A)

Hoochie [10]

Adaptation is supported by Darwin's observation of local variation among tortoises in the Galapagos Islands.

In biology, an adaptation, also called an adaptive trait, is a trait with a current functional role in the life of an organism that is maintained and evolved by means of natural selection. Adaptation refers to both the current state of being adapted and to the dynamic evolutionary process that leads to the adaptation.

The correct answer between all the choices given is the second choice or letter B. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

4 0

3 years ago