Which of the following blood components provide the major defense for our bodies against viruses

What is the relationship between genetic variation and natural selection?

fredd [130]

Genetic variation is when there are many offspring with different genetics, therefore some offspring might be able to adapt due to its genetics

4 0

3 years ago

Can the use of badger control (including culling) be justified in the

bonufazy [111]

Answer:

no. badger vaccination is better

Explanation:

spreading mostly happens cattle to cattle

"killing badgers will not solve the problem. Badgers are not the primary cause of the spread of bTB in cattle: the primary route of infection is cattle-to-cattle contact[2]. The Government's badger cull is flying in the face of science. It should be putting more resources into speeding up the development of an effective cattle vaccine, amongst other measures"

wildlife life trusts

5 0

3 years ago

Removing which of the following glands would most likely have the most wide- reaching effect on bodily functions of an adult hum

mart [117]

Answer:

D) anterior pituitary gland

Explanation:

The anterior pituitary gland is the front portion of the pituitary. It is a small gland in the head called the master gland. Hormones which are secreted by the anterior pituitary influence growth, sexual development, skin pigmentation, thyroid function, and adrenocortical function.

The Anterior Lobe of the pituitary plays the 'master' role of the human body through secretion of six major hormones that affect most of the body. This includes the other Endocrine glands.

6 0

3 years ago

List and describe the three elements of media literacy

mariarad [96]

The first stage is simply becoming aware of the importance of managing one's media "diet"--- that is, making choices and reducing the time spent with television, videos, electronic games, films and various print media forms.

The second stage is learning specific skills of critical viewing--- learning to analyze and question what is in the frame, how it is constructed and what may have been left out. Skills of critical viewing are best learned through inquiry-based classes or interactive group activities, as well as from creating and producing one's own media messages.

The third stage goes behind the frame to explore deeper issues. Who produces the media we experience and for what purpose? Who profits? Who loses? And who decides? This stage of social, political and economic analysis looks at how everyone in society makes meaning from our media experiences, and how the mass media drive our global consumer economy. This inquiry can sometimes set the stage for various media advocacy efforts to challenge or redress public policies or corporate practices.

5 0

3 years ago

La polidactilia en la especie humana se debe a un alelo dominante. Entre Francisco y Martha, ambos abuelos de Santiago, uno de e

lesya [120]

Answer:

Abuelo/a con polidactilia heterocigoto, Pp
Abuelo/a normal, pp
Juan normal, pp
Esposa de Juan con polidactilia, PP o Pp
Santiago con polidactilia, Pp

Explanation:

Datos disponibles:

Polidactilia es causada por un alelo dominante, P.
El alelo recesivo p produce numero normal de dedos.
Francisco y Martha → Abuelos → uno de ellos con polidactilia
Juan → Hijo → Normal, pp
Santiago → Nieto → Polidactílico

Uno de los padres, ya sea Francisco o Martha, es polidactílico, lo que implica que ésta persona tiene, por lo menos, un allelo dominante en su genotipo, P- (El simbolo "-" esta representando un alelo dominante o uno recesivo).

Si Juan es normal, entonces su genotipo es pp, lo que significa que recibió un alelo recesivo de su padre y otro de su madre. Es decir que el parental policactílico es heterocigota, de forma que pudo heredarle un alelo recesivo a Juan. El otro parental probablemente sea normal, pp, pudiendo solo heredarle a Juan el alelo recesivo.

Entonces, uno de los padres tiene genotipo Pp (heterocigota) y el otro pp (homocigota recesivo).

Juan es norma, pp.

Santiago, hijo de Juan, es polidactílico, lo que implica que lleva en su genotipo por lo menos un alelo dominante, P. Pero Juan solo pudo heredarle un alelo recesivo, p. Por lo tanto, Santiago es heterocigota para la característica, Pp, y heredó el alelo dominante de su madre, que puede ser homcigota dominante PP o heterocigota Pp.

Supongamos que Francisco es polidactílico y Martha normal.

1º Cruza: Francisco x Martha

Parentales) Pp x pp

Gametas) P p p p

F1) 1/2 = 50% Pp

1/2 = 50% pp → Juan

2º Cruza: Juan x Esposa (opción uno: esposa homocigota dominante)

Parentales) pp x PP

Gametas) p p P P

F2) 4/4 = 100% Pp → Santiago

2º Cruza: Juan x Esposa (opción dos: esposa heterocigota)

Parentales) pp x Pp

Gametas) p p P p

F2) 1/2 = 50% Pp → Santiago

1/2 = 50% pp

6 0

2 years ago